21270039

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12821}}^1$

素因数の和:12910

約数の個数: 16

約数和(自身を含む): 32824320

約数和(自身を除く): 11554281

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12821, 38463, 89747, 269241, 1012859, 3038577, 7090013, 21270039]

約数ペア:

[(1, 21270039), (3, 7090013), (7, 3038577), (21, 1012859), (79, 269241), (237, 89747), (553, 38463), (1659, 12821)]