20524780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 47346768

約数和(自身を除く): 26821988

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 53, 67, 68, 85, 106, 134, 170, 212, 265, 268, 289, 335, 340, 530, 578, 670, 901, 1060, 1139, 1156, 1340, 1445, 1802, 2278, 2890, 3551, 3604, 4505, 4556, 5695, 5780, 7102, 9010, 11390, 14204, 15317, 17755, 18020, 19363, 22780, 30634, 35510, 38726, 60367, 61268, 71020, 76585, 77452, 96815, 120734, 153170, 193630, 241468, 301835, 306340, 387260, 603670, 1026239, 1207340, 2052478, 4104956, 5131195, 10262390, 20524780]

約数ペア:

[(1, 20524780), (2, 10262390), (4, 5131195), (5, 4104956), (10, 2052478), (17, 1207340), (20, 1026239), (34, 603670), (53, 387260), (67, 306340), (68, 301835), (85, 241468), (106, 193630), (134, 153170), (170, 120734), (212, 96815), (265, 77452), (268, 76585), (289, 71020), (335, 61268), (340, 60367), (530, 38726), (578, 35510), (670, 30634), (901, 22780), (1060, 19363), (1139, 18020), (1156, 17755), (1340, 15317), (1445, 14204), (1802, 11390), (2278, 9010), (2890, 7102), (3551, 5780), (3604, 5695), (4505, 4556)]