21177915

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128351}}^1$

素因数の和:128370

約数の個数: 16

約数和(自身を含む): 36965376

約数和(自身を除く): 15787461

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128351, 385053, 641755, 1411861, 1925265, 4235583, 7059305, 21177915]

約数ペア:

[(1, 21177915), (3, 7059305), (5, 4235583), (11, 1925265), (15, 1411861), (33, 641755), (55, 385053), (165, 128351)]