21500710

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{3989}}^1$

素因数の和:4021

約数の個数: 48

約数和(自身を含む): 49124880

約数和(自身を除く): 27624170

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 49, 55, 70, 77, 98, 110, 154, 245, 385, 490, 539, 770, 1078, 2695, 3989, 5390, 7978, 19945, 27923, 39890, 43879, 55846, 87758, 139615, 195461, 219395, 279230, 307153, 390922, 438790, 614306, 977305, 1535765, 1954610, 2150071, 3071530, 4300142, 10750355, 21500710]

約数ペア:

[(1, 21500710), (2, 10750355), (5, 4300142), (7, 3071530), (10, 2150071), (11, 1954610), (14, 1535765), (22, 977305), (35, 614306), (49, 438790), (55, 390922), (70, 307153), (77, 279230), (98, 219395), (110, 195461), (154, 139615), (245, 87758), (385, 55846), (490, 43879), (539, 39890), (770, 27923), (1078, 19945), (2695, 7978), (3989, 5390)]