21080290

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{3911}}^1$

素因数の和:3943

約数の個数: 48

約数和(自身を含む): 48164544

約数和(自身を除く): 27084254

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, 3911, 5390, 7822, 19555, 27377, 39110, 43021, 54754, 86042, 136885, 191639, 215105, 273770, 301147, 383278, 430210, 602294, 958195, 1505735, 1916390, 2108029, 3011470, 4216058, 10540145, 21080290]

約数ペア:

[(1, 21080290), (2, 10540145), (5, 4216058), (7, 3011470), (10, 2108029), (11, 1916390), (14, 1505735), (22, 958195), (35, 602294), (49, 430210), (55, 383278), (70, 301147), (77, 273770), (98, 215105), (110, 191639), (154, 136885), (245, 86042), (385, 54754), (490, 43021), (539, 39110), (770, 27377), (1078, 19555), (2695, 7822), (3911, 5390)]