21520426

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1\times {\mathrm{1087}}^1$

素因数の和:1629

約数の個数: 16

約数和(自身を含む): 34076160

約数和(自身を除く): 12555734

約数列:

[1, 2, 19, 38, 521, 1042, 1087, 2174, 9899, 19798, 20653, 41306, 566327, 1132654, 10760213, 21520426]

約数ペア:

[(1, 21520426), (2, 10760213), (19, 1132654), (38, 566327), (521, 41306), (1042, 20653), (1087, 19798), (2174, 9899)]