219989110

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{19801}}^1$

素因数の和:19920

約数の個数: 32

約数和(自身を含む): 436277664

約数和(自身を除く): 216288554

約数列:

[1, 2, 5, 10, 11, 22, 55, 101, 110, 202, 505, 1010, 1111, 2222, 5555, 11110, 19801, 39602, 99005, 198010, 217811, 435622, 1089055, 1999901, 2178110, 3999802, 9999505, 19999010, 21998911, 43997822, 109994555, 219989110]

約数ペア:

[(1, 219989110), (2, 109994555), (5, 43997822), (10, 21998911), (11, 19999010), (22, 9999505), (55, 3999802), (101, 2178110), (110, 1999901), (202, 1089055), (505, 435622), (1010, 217811), (1111, 198010), (2222, 99005), (5555, 39602), (11110, 19801)]