681580

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{643}}^1$

素因数の和:705

約数の個数: 24

約数和(自身を含む): 1460592

約数和(自身を除く): 779012

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 643, 1060, 1286, 2572, 3215, 6430, 12860, 34079, 68158, 136316, 170395, 340790, 681580]

約数ペア:

[(1, 681580), (2, 340790), (4, 170395), (5, 136316), (10, 68158), (20, 34079), (53, 12860), (106, 6430), (212, 3215), (265, 2572), (530, 1286), (643, 1060)]