16864720

素因数分解:

$2^4\times 5^1\times {\mathrm{210809}}^1$

素因数の和:210822

約数の個数: 20

約数和(自身を含む): 39210660

約数和(自身を除く): 22345940

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 210809, 421618, 843236, 1054045, 1686472, 2108090, 3372944, 4216180, 8432360, 16864720]

約数ペア:

[(1, 16864720), (2, 8432360), (4, 4216180), (5, 3372944), (8, 2108090), (10, 1686472), (16, 1054045), (20, 843236), (40, 421618), (80, 210809)]