20685990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:142

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 37374810

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 29, 30, 31, 39, 58, 59, 62, 65, 78, 87, 93, 118, 130, 145, 155, 174, 177, 186, 195, 290, 295, 310, 354, 377, 390, 403, 435, 465, 590, 754, 767, 806, 870, 885, 899, 930, 1131, 1209, 1534, 1711, 1770, 1798, 1829, 1885, 2015, 2262, 2301, 2418, 2697, 3422, 3658, 3770, 3835, 4030, 4495, 4602, 5133, 5394, 5487, 5655, 6045, 7670, 8555, 8990, 9145, 10266, 10974, 11310, 11505, 11687, 12090, 13485, 17110, 18290, 22243, 23010, 23374, 23777, 25665, 26970, 27435, 35061, 44486, 47554, 51330, 53041, 54870, 58435, 66729, 70122, 71331, 106082, 111215, 116870, 118885, 133458, 142662, 159123, 175305, 222430, 237770, 265205, 318246, 333645, 350610, 356655, 530410, 667290, 689533, 713310, 795615, 1379066, 1591230, 2068599, 3447665, 4137198, 6895330, 10342995, 20685990]

約数ペア:

[(1, 20685990), (2, 10342995), (3, 6895330), (5, 4137198), (6, 3447665), (10, 2068599), (13, 1591230), (15, 1379066), (26, 795615), (29, 713310), (30, 689533), (31, 667290), (39, 530410), (58, 356655), (59, 350610), (62, 333645), (65, 318246), (78, 265205), (87, 237770), (93, 222430), (118, 175305), (130, 159123), (145, 142662), (155, 133458), (174, 118885), (177, 116870), (186, 111215), (195, 106082), (290, 71331), (295, 70122), (310, 66729), (354, 58435), (377, 54870), (390, 53041), (403, 51330), (435, 47554), (465, 44486), (590, 35061), (754, 27435), (767, 26970), (806, 25665), (870, 23777), (885, 23374), (899, 23010), (930, 22243), (1131, 18290), (1209, 17110), (1534, 13485), (1711, 12090), (1770, 11687), (1798, 11505), (1829, 11310), (1885, 10974), (2015, 10266), (2262, 9145), (2301, 8990), (2418, 8555), (2697, 7670), (3422, 6045), (3658, 5655), (3770, 5487), (3835, 5394), (4030, 5133), (4495, 4602)]