21090316

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{1697}}^1$

素因数の和:1953

約数の個数: 24

約数和(自身を含む): 39936960

約数和(自身を除く): 18846644

約数列:

[1, 2, 4, 13, 26, 52, 239, 478, 956, 1697, 3107, 3394, 6214, 6788, 12428, 22061, 44122, 88244, 405583, 811166, 1622332, 5272579, 10545158, 21090316]

約数ペア:

[(1, 21090316), (2, 10545158), (4, 5272579), (13, 1622332), (26, 811166), (52, 405583), (239, 88244), (478, 44122), (956, 22061), (1697, 12428), (3107, 6788), (3394, 6214)]