20913850

素因数分解:

$2^1\times 5^2\times {\mathrm{61}}^1\times {\mathrm{6857}}^1$

素因数の和:6930

約数の個数: 24

約数和(自身を含む): 39543228

約数和(自身を除く): 18629378

約数列:

[1, 2, 5, 10, 25, 50, 61, 122, 305, 610, 1525, 3050, 6857, 13714, 34285, 68570, 171425, 342850, 418277, 836554, 2091385, 4182770, 10456925, 20913850]

約数ペア:

[(1, 20913850), (2, 10456925), (5, 4182770), (10, 2091385), (25, 836554), (50, 418277), (61, 342850), (122, 171425), (305, 68570), (610, 34285), (1525, 13714), (3050, 6857)]