128789840

素因数分解:

$2^4\times 5^1\times {\mathrm{1609873}}^1$

素因数の和:1609886

約数の個数: 20

約数和(自身を含む): 299436564

約数和(自身を除く): 170646724

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1609873, 3219746, 6439492, 8049365, 12878984, 16098730, 25757968, 32197460, 64394920, 128789840]

約数ペア:

[(1, 128789840), (2, 64394920), (4, 32197460), (5, 25757968), (8, 16098730), (10, 12878984), (16, 8049365), (20, 6439492), (40, 3219746), (80, 1609873)]