21291363915

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19991891}}^1$

素因数の和:19991970

約数の個数: 16

約数和(自身を含む): 34545989376

約数和(自身を除く): 13254625461

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19991891, 59975673, 99959455, 299878365, 1419424261, 4258272783, 7097121305, 21291363915]

約数ペア:

[(1, 21291363915), (3, 7097121305), (5, 4258272783), (15, 1419424261), (71, 299878365), (213, 99959455), (355, 59975673), (1065, 19991891)]