21160816

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{30757}}^1$

素因数の和:30808

約数の個数: 20

約数和(自身を含む): 41953912

約数和(自身を除く): 20793096

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 30757, 61514, 123028, 246056, 492112, 1322551, 2645102, 5290204, 10580408, 21160816]

約数ペア:

[(1, 21160816), (2, 10580408), (4, 5290204), (8, 2645102), (16, 1322551), (43, 492112), (86, 246056), (172, 123028), (344, 61514), (688, 30757)]