20718180

素因数分解:

$2^2\times 3^6\times 5^1\times 7^2\times {\mathrm{29}}^1$

素因数の和:70

約数の個数: 252

約数和(自身を含む): 78499260

約数和(自身を除く): 57781080

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 29, 30, 35, 36, 42, 45, 49, 54, 58, 60, 63, 70, 81, 84, 87, 90, 98, 105, 108, 116, 126, 135, 140, 145, 147, 162, 174, 180, 189, 196, 203, 210, 243, 245, 252, 261, 270, 290, 294, 315, 324, 348, 378, 405, 406, 420, 435, 441, 486, 490, 522, 540, 567, 580, 588, 609, 630, 729, 735, 756, 783, 810, 812, 870, 882, 945, 972, 980, 1015, 1044, 1134, 1215, 1218, 1260, 1305, 1323, 1421, 1458, 1470, 1566, 1620, 1701, 1740, 1764, 1827, 1890, 2030, 2205, 2268, 2349, 2430, 2436, 2610, 2646, 2835, 2842, 2916, 2940, 3045, 3132, 3402, 3645, 3654, 3780, 3915, 3969, 4060, 4263, 4410, 4698, 4860, 5103, 5220, 5292, 5481, 5670, 5684, 6090, 6615, 6804, 7047, 7105, 7290, 7308, 7830, 7938, 8505, 8526, 8820, 9135, 9396, 10206, 10962, 11340, 11745, 11907, 12180, 12789, 13230, 14094, 14210, 14580, 15660, 15876, 16443, 17010, 17052, 18270, 19845, 20412, 21141, 21315, 21924, 23490, 23814, 25515, 25578, 26460, 27405, 28188, 28420, 32886, 34020, 35235, 35721, 36540, 38367, 39690, 42282, 42630, 46980, 47628, 49329, 51030, 51156, 54810, 59535, 63945, 65772, 70470, 71442, 76734, 79380, 82215, 84564, 85260, 98658, 102060, 105705, 109620, 115101, 119070, 127890, 140940, 142884, 147987, 153468, 164430, 178605, 191835, 197316, 211410, 230202, 238140, 246645, 255780, 295974, 328860, 345303, 357210, 383670, 422820, 460404, 493290, 575505, 591948, 690606, 714420, 739935, 767340, 986580, 1035909, 1151010, 1381212, 1479870, 1726515, 2071818, 2302020, 2959740, 3453030, 4143636, 5179545, 6906060, 10359090, 20718180]

約数ペア:

[(1, 20718180), (2, 10359090), (3, 6906060), (4, 5179545), (5, 4143636), (6, 3453030), (7, 2959740), (9, 2302020), (10, 2071818), (12, 1726515), (14, 1479870), (15, 1381212), (18, 1151010), (20, 1035909), (21, 986580), (27, 767340), (28, 739935), (29, 714420), (30, 690606), (35, 591948), (36, 575505), (42, 493290), (45, 460404), (49, 422820), (54, 383670), (58, 357210), (60, 345303), (63, 328860), (70, 295974), (81, 255780), (84, 246645), (87, 238140), (90, 230202), (98, 211410), (105, 197316), (108, 191835), (116, 178605), (126, 164430), (135, 153468), (140, 147987), (145, 142884), (147, 140940), (162, 127890), (174, 119070), (180, 115101), (189, 109620), (196, 105705), (203, 102060), (210, 98658), (243, 85260), (245, 84564), (252, 82215), (261, 79380), (270, 76734), (290, 71442), (294, 70470), (315, 65772), (324, 63945), (348, 59535), (378, 54810), (405, 51156), (406, 51030), (420, 49329), (435, 47628), (441, 46980), (486, 42630), (490, 42282), (522, 39690), (540, 38367), (567, 36540), (580, 35721), (588, 35235), (609, 34020), (630, 32886), (729, 28420), (735, 28188), (756, 27405), (783, 26460), (810, 25578), (812, 25515), (870, 23814), (882, 23490), (945, 21924), (972, 21315), (980, 21141), (1015, 20412), (1044, 19845), (1134, 18270), (1215, 17052), (1218, 17010), (1260, 16443), (1305, 15876), (1323, 15660), (1421, 14580), (1458, 14210), (1470, 14094), (1566, 13230), (1620, 12789), (1701, 12180), (1740, 11907), (1764, 11745), (1827, 11340), (1890, 10962), (2030, 10206), (2205, 9396), (2268, 9135), (2349, 8820), (2430, 8526), (2436, 8505), (2610, 7938), (2646, 7830), (2835, 7308), (2842, 7290), (2916, 7105), (2940, 7047), (3045, 6804), (3132, 6615), (3402, 6090), (3645, 5684), (3654, 5670), (3780, 5481), (3915, 5292), (3969, 5220), (4060, 5103), (4263, 4860), (4410, 4698)]