21048940

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{241}}^1\times {\mathrm{397}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 48543264

約数和(自身を除く): 27494324

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 241, 397, 482, 794, 964, 1205, 1588, 1985, 2410, 2651, 3970, 4367, 4820, 5302, 7940, 8734, 10604, 13255, 17468, 21835, 26510, 43670, 53020, 87340, 95677, 191354, 382708, 478385, 956770, 1052447, 1913540, 2104894, 4209788, 5262235, 10524470, 21048940]

約数ペア:

[(1, 21048940), (2, 10524470), (4, 5262235), (5, 4209788), (10, 2104894), (11, 1913540), (20, 1052447), (22, 956770), (44, 478385), (55, 382708), (110, 191354), (220, 95677), (241, 87340), (397, 53020), (482, 43670), (794, 26510), (964, 21835), (1205, 17468), (1588, 13255), (1985, 10604), (2410, 8734), (2651, 7940), (3970, 5302), (4367, 4820)]