21905739

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{419}}^1$

素因数の和:619

約数の個数: 24

約数和(自身を含む): 32781840

約数和(自身を除く): 10876101

約数列:

[1, 3, 9, 37, 111, 157, 333, 419, 471, 1257, 1413, 3771, 5809, 15503, 17427, 46509, 52281, 65783, 139527, 197349, 592047, 2433971, 7301913, 21905739]

約数ペア:

[(1, 21905739), (3, 7301913), (9, 2433971), (37, 592047), (111, 197349), (157, 139527), (333, 65783), (419, 52281), (471, 46509), (1257, 17427), (1413, 15503), (3771, 5809)]