21498920

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{10141}}^1$

素因数の和:10205

約数の個数: 32

約数和(自身を含む): 49290120

約数和(自身を除く): 27791200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 10141, 20282, 40564, 50705, 81128, 101410, 202820, 405640, 537473, 1074946, 2149892, 2687365, 4299784, 5374730, 10749460, 21498920]

約数ペア:

[(1, 21498920), (2, 10749460), (4, 5374730), (5, 4299784), (8, 2687365), (10, 2149892), (20, 1074946), (40, 537473), (53, 405640), (106, 202820), (212, 101410), (265, 81128), (424, 50705), (530, 40564), (1060, 20282), (2120, 10141)]