20367640

素因数分解:

$2^3\times 5^1\times {\mathrm{349}}^1\times {\mathrm{1459}}^1$

素因数の和:1819

約数の個数: 32

約数和(自身を含む): 45990000

約数和(自身を除く): 25622360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 349, 698, 1396, 1459, 1745, 2792, 2918, 3490, 5836, 6980, 7295, 11672, 13960, 14590, 29180, 58360, 509191, 1018382, 2036764, 2545955, 4073528, 5091910, 10183820, 20367640]

約数ペア:

[(1, 20367640), (2, 10183820), (4, 5091910), (5, 4073528), (8, 2545955), (10, 2036764), (20, 1018382), (40, 509191), (349, 58360), (698, 29180), (1396, 14590), (1459, 13960), (1745, 11672), (2792, 7295), (2918, 6980), (3490, 5836)]