20217890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^3\times {\mathrm{31}}^1$

素因数の和:85

約数の個数: 96

約数和(自身を含む): 48066048

約数和(自身を除く): 27848158

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 31, 35, 49, 55, 62, 70, 77, 98, 110, 121, 154, 155, 217, 242, 245, 310, 341, 385, 434, 490, 539, 605, 682, 770, 847, 1078, 1085, 1210, 1331, 1519, 1694, 1705, 2170, 2387, 2662, 2695, 3038, 3410, 3751, 4235, 4774, 5390, 5929, 6655, 7502, 7595, 8470, 9317, 11858, 11935, 13310, 15190, 16709, 18634, 18755, 23870, 26257, 29645, 33418, 37510, 41261, 46585, 52514, 59290, 65219, 82522, 83545, 93170, 130438, 131285, 167090, 183799, 206305, 262570, 288827, 326095, 367598, 412610, 577654, 652190, 918995, 1444135, 1837990, 2021789, 2888270, 4043578, 10108945, 20217890]

約数ペア:

[(1, 20217890), (2, 10108945), (5, 4043578), (7, 2888270), (10, 2021789), (11, 1837990), (14, 1444135), (22, 918995), (31, 652190), (35, 577654), (49, 412610), (55, 367598), (62, 326095), (70, 288827), (77, 262570), (98, 206305), (110, 183799), (121, 167090), (154, 131285), (155, 130438), (217, 93170), (242, 83545), (245, 82522), (310, 65219), (341, 59290), (385, 52514), (434, 46585), (490, 41261), (539, 37510), (605, 33418), (682, 29645), (770, 26257), (847, 23870), (1078, 18755), (1085, 18634), (1210, 16709), (1331, 15190), (1519, 13310), (1694, 11935), (1705, 11858), (2170, 9317), (2387, 8470), (2662, 7595), (2695, 7502), (3038, 6655), (3410, 5929), (3751, 5390), (4235, 4774)]