21490945

素因数分解:

$5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{3911}}^1$

素因数の和:4080

約数の個数: 16

約数和(自身を含む): 29668608

約数和(自身を除く): 8177663

約数列:

[1, 5, 7, 35, 157, 785, 1099, 3911, 5495, 19555, 27377, 136885, 614027, 3070135, 4298189, 21490945]

約数ペア:

[(1, 21490945), (5, 4298189), (7, 3070135), (35, 614027), (157, 136885), (785, 27377), (1099, 19555), (3911, 5495)]