20712220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13109}}^1$

素因数の和:13197

約数の個数: 24

約数和(自身を含む): 44049600

約数和(自身を除く): 23337380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13109, 26218, 52436, 65545, 131090, 262180, 1035611, 2071222, 4142444, 5178055, 10356110, 20712220]

約数ペア:

[(1, 20712220), (2, 10356110), (4, 5178055), (5, 4142444), (10, 2071222), (20, 1035611), (79, 262180), (158, 131090), (316, 65545), (395, 52436), (790, 26218), (1580, 13109)]