20961860

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13267}}^1$

素因数の和:13355

約数の個数: 24

約数和(自身を含む): 44580480

約数和(自身を除く): 23618620

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13267, 26534, 53068, 66335, 132670, 265340, 1048093, 2096186, 4192372, 5240465, 10480930, 20961860]

約数ペア:

[(1, 20961860), (2, 10480930), (4, 5240465), (5, 4192372), (10, 2096186), (20, 1048093), (79, 265340), (158, 132670), (316, 66335), (395, 53068), (790, 26534), (1580, 13267)]