20921860

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4691}}^1$

素因数の和:4923

約数の個数: 24

約数和(自身を含む): 44142336

約数和(自身を除く): 23220476

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4691, 9382, 18764, 23455, 46910, 93820, 1046093, 2092186, 4184372, 5230465, 10460930, 20921860]

約数ペア:

[(1, 20921860), (2, 10460930), (4, 5230465), (5, 4184372), (10, 2092186), (20, 1046093), (223, 93820), (446, 46910), (892, 23455), (1115, 18764), (2230, 9382), (4460, 4691)]