20561580

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:161

約数の個数: 192

約数和(自身を含む): 71971200

約数和(自身を除く): 51409620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 29, 30, 36, 39, 45, 52, 54, 58, 60, 65, 78, 87, 90, 101, 108, 116, 117, 130, 135, 145, 156, 174, 180, 195, 202, 234, 260, 261, 270, 290, 303, 348, 351, 377, 390, 404, 435, 468, 505, 522, 540, 580, 585, 606, 702, 754, 780, 783, 870, 909, 1010, 1044, 1131, 1170, 1212, 1305, 1313, 1404, 1508, 1515, 1566, 1740, 1755, 1818, 1885, 2020, 2262, 2340, 2610, 2626, 2727, 2929, 3030, 3132, 3393, 3510, 3636, 3770, 3915, 3939, 4524, 4545, 5220, 5252, 5454, 5655, 5858, 6060, 6565, 6786, 7020, 7540, 7830, 7878, 8787, 9090, 10179, 10908, 11310, 11716, 11817, 13130, 13572, 13635, 14645, 15660, 15756, 16965, 17574, 18180, 19695, 20358, 22620, 23634, 26260, 26361, 27270, 29290, 33930, 35148, 35451, 38077, 39390, 40716, 43935, 47268, 50895, 52722, 54540, 58580, 59085, 67860, 70902, 76154, 78780, 79083, 87870, 101790, 105444, 114231, 118170, 131805, 141804, 152308, 158166, 175740, 177255, 190385, 203580, 228462, 236340, 263610, 316332, 342693, 354510, 380770, 395415, 456924, 527220, 571155, 685386, 709020, 761540, 790830, 1028079, 1142310, 1370772, 1581660, 1713465, 2056158, 2284620, 3426930, 4112316, 5140395, 6853860, 10280790, 20561580]

約数ペア:

[(1, 20561580), (2, 10280790), (3, 6853860), (4, 5140395), (5, 4112316), (6, 3426930), (9, 2284620), (10, 2056158), (12, 1713465), (13, 1581660), (15, 1370772), (18, 1142310), (20, 1028079), (26, 790830), (27, 761540), (29, 709020), (30, 685386), (36, 571155), (39, 527220), (45, 456924), (52, 395415), (54, 380770), (58, 354510), (60, 342693), (65, 316332), (78, 263610), (87, 236340), (90, 228462), (101, 203580), (108, 190385), (116, 177255), (117, 175740), (130, 158166), (135, 152308), (145, 141804), (156, 131805), (174, 118170), (180, 114231), (195, 105444), (202, 101790), (234, 87870), (260, 79083), (261, 78780), (270, 76154), (290, 70902), (303, 67860), (348, 59085), (351, 58580), (377, 54540), (390, 52722), (404, 50895), (435, 47268), (468, 43935), (505, 40716), (522, 39390), (540, 38077), (580, 35451), (585, 35148), (606, 33930), (702, 29290), (754, 27270), (780, 26361), (783, 26260), (870, 23634), (909, 22620), (1010, 20358), (1044, 19695), (1131, 18180), (1170, 17574), (1212, 16965), (1305, 15756), (1313, 15660), (1404, 14645), (1508, 13635), (1515, 13572), (1566, 13130), (1740, 11817), (1755, 11716), (1818, 11310), (1885, 10908), (2020, 10179), (2262, 9090), (2340, 8787), (2610, 7878), (2626, 7830), (2727, 7540), (2929, 7020), (3030, 6786), (3132, 6565), (3393, 6060), (3510, 5858), (3636, 5655), (3770, 5454), (3915, 5252), (3939, 5220), (4524, 4545)]