21123180

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1$

素因数の和:110

約数の個数: 240

約数和(自身を含む): 76839840

約数和(自身を除く): 55716660

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 17, 18, 20, 26, 27, 30, 34, 36, 39, 45, 51, 52, 54, 59, 60, 65, 68, 78, 81, 85, 90, 102, 108, 117, 118, 130, 135, 153, 156, 162, 170, 177, 180, 195, 204, 221, 234, 236, 255, 260, 270, 295, 306, 324, 340, 351, 354, 390, 405, 442, 459, 468, 510, 531, 540, 585, 590, 612, 663, 702, 708, 765, 767, 780, 810, 884, 885, 918, 1003, 1020, 1053, 1062, 1105, 1170, 1180, 1326, 1377, 1404, 1530, 1534, 1593, 1620, 1755, 1770, 1836, 1989, 2006, 2106, 2124, 2210, 2295, 2301, 2340, 2652, 2655, 2754, 3009, 3060, 3068, 3186, 3315, 3510, 3540, 3835, 3978, 4012, 4212, 4420, 4590, 4602, 4779, 5015, 5265, 5310, 5508, 5967, 6018, 6372, 6630, 6885, 6903, 7020, 7670, 7956, 7965, 9027, 9180, 9204, 9558, 9945, 10030, 10530, 10620, 11505, 11934, 12036, 13039, 13260, 13770, 13806, 15045, 15340, 15930, 17901, 18054, 19116, 19890, 20060, 20709, 21060, 23010, 23868, 23895, 26078, 27081, 27540, 27612, 29835, 30090, 31860, 34515, 35802, 36108, 39117, 39780, 41418, 45135, 46020, 47790, 52156, 54162, 59670, 60180, 62127, 65195, 69030, 71604, 78234, 81243, 82836, 89505, 90270, 95580, 103545, 108324, 117351, 119340, 124254, 130390, 135405, 138060, 156468, 162486, 179010, 180540, 195585, 207090, 234702, 248508, 260780, 270810, 310635, 324972, 352053, 358020, 391170, 406215, 414180, 469404, 541620, 586755, 621270, 704106, 782340, 812430, 1056159, 1173510, 1242540, 1408212, 1624860, 1760265, 2112318, 2347020, 3520530, 4224636, 5280795, 7041060, 10561590, 21123180]

約数ペア:

[(1, 21123180), (2, 10561590), (3, 7041060), (4, 5280795), (5, 4224636), (6, 3520530), (9, 2347020), (10, 2112318), (12, 1760265), (13, 1624860), (15, 1408212), (17, 1242540), (18, 1173510), (20, 1056159), (26, 812430), (27, 782340), (30, 704106), (34, 621270), (36, 586755), (39, 541620), (45, 469404), (51, 414180), (52, 406215), (54, 391170), (59, 358020), (60, 352053), (65, 324972), (68, 310635), (78, 270810), (81, 260780), (85, 248508), (90, 234702), (102, 207090), (108, 195585), (117, 180540), (118, 179010), (130, 162486), (135, 156468), (153, 138060), (156, 135405), (162, 130390), (170, 124254), (177, 119340), (180, 117351), (195, 108324), (204, 103545), (221, 95580), (234, 90270), (236, 89505), (255, 82836), (260, 81243), (270, 78234), (295, 71604), (306, 69030), (324, 65195), (340, 62127), (351, 60180), (354, 59670), (390, 54162), (405, 52156), (442, 47790), (459, 46020), (468, 45135), (510, 41418), (531, 39780), (540, 39117), (585, 36108), (590, 35802), (612, 34515), (663, 31860), (702, 30090), (708, 29835), (765, 27612), (767, 27540), (780, 27081), (810, 26078), (884, 23895), (885, 23868), (918, 23010), (1003, 21060), (1020, 20709), (1053, 20060), (1062, 19890), (1105, 19116), (1170, 18054), (1180, 17901), (1326, 15930), (1377, 15340), (1404, 15045), (1530, 13806), (1534, 13770), (1593, 13260), (1620, 13039), (1755, 12036), (1770, 11934), (1836, 11505), (1989, 10620), (2006, 10530), (2106, 10030), (2124, 9945), (2210, 9558), (2295, 9204), (2301, 9180), (2340, 9027), (2652, 7965), (2655, 7956), (2754, 7670), (3009, 7020), (3060, 6903), (3068, 6885), (3186, 6630), (3315, 6372), (3510, 6018), (3540, 5967), (3835, 5508), (3978, 5310), (4012, 5265), (4212, 5015), (4420, 4779), (4590, 4602)]