19856440

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{751}}^1$

素因数の和:1423

約数の個数: 32

約数和(自身を含む): 44804160

約数和(自身を除く): 24947720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 751, 1322, 1502, 2644, 3004, 3305, 3755, 5288, 6008, 6610, 7510, 13220, 15020, 26440, 30040, 496411, 992822, 1985644, 2482055, 3971288, 4964110, 9928220, 19856440]

約数ペア:

[(1, 19856440), (2, 9928220), (4, 4964110), (5, 3971288), (8, 2482055), (10, 1985644), (20, 992822), (40, 496411), (661, 30040), (751, 26440), (1322, 15020), (1502, 13220), (2644, 7510), (3004, 6610), (3305, 6008), (3755, 5288)]