20683820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{457}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 45550848

約数和(自身を除く): 24867028

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 73, 124, 146, 155, 292, 310, 365, 457, 620, 730, 914, 1460, 1828, 2263, 2285, 4526, 4570, 9052, 9140, 11315, 14167, 22630, 28334, 33361, 45260, 56668, 66722, 70835, 133444, 141670, 166805, 283340, 333610, 667220, 1034191, 2068382, 4136764, 5170955, 10341910, 20683820]

約数ペア:

[(1, 20683820), (2, 10341910), (4, 5170955), (5, 4136764), (10, 2068382), (20, 1034191), (31, 667220), (62, 333610), (73, 283340), (124, 166805), (146, 141670), (155, 133444), (292, 70835), (310, 66722), (365, 56668), (457, 45260), (620, 33361), (730, 28334), (914, 22630), (1460, 14167), (1828, 11315), (2263, 9140), (2285, 9052), (4526, 4570)]