20388890

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{223}}^2$

素因数の和:494

約数の個数: 24

約数和(自身を含む): 37764468

約数和(自身を除く): 17375578

約数列:

[1, 2, 5, 10, 41, 82, 205, 223, 410, 446, 1115, 2230, 9143, 18286, 45715, 49729, 91430, 99458, 248645, 497290, 2038889, 4077778, 10194445, 20388890]

約数ペア:

[(1, 20388890), (2, 10194445), (5, 4077778), (10, 2038889), (41, 497290), (82, 248645), (205, 99458), (223, 91430), (410, 49729), (446, 45715), (1115, 18286), (2230, 9143)]