21398876

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{191}}^1\times {\mathrm{757}}^1$

素因数の和:989

約数の個数: 24

約数和(自身を含む): 38712576

約数和(自身を除く): 17313700

約数列:

[1, 2, 4, 37, 74, 148, 191, 382, 757, 764, 1514, 3028, 7067, 14134, 28009, 28268, 56018, 112036, 144587, 289174, 578348, 5349719, 10699438, 21398876]

約数ペア:

[(1, 21398876), (2, 10699438), (4, 5349719), (37, 578348), (74, 289174), (148, 144587), (191, 112036), (382, 56018), (757, 28268), (764, 28009), (1514, 14134), (3028, 7067)]