21235990

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{26881}}^1$

素因数の和:26967

約数の個数: 16

約数和(自身を含む): 38710080

約数和(自身を除く): 17474090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 26881, 53762, 134405, 268810, 2123599, 4247198, 10617995, 21235990]

約数ペア:

[(1, 21235990), (2, 10617995), (5, 4247198), (10, 2123599), (79, 268810), (158, 134405), (395, 53762), (790, 26881)]