21939160

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{853}}^1$

素因数の和:1507

約数の個数: 32

約数和(自身を含む): 49497840

約数和(自身を除く): 27558680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 853, 1286, 1706, 2572, 3215, 3412, 4265, 5144, 6430, 6824, 8530, 12860, 17060, 25720, 34120, 548479, 1096958, 2193916, 2742395, 4387832, 5484790, 10969580, 21939160]

約数ペア:

[(1, 21939160), (2, 10969580), (4, 5484790), (5, 4387832), (8, 2742395), (10, 2193916), (20, 1096958), (40, 548479), (643, 34120), (853, 25720), (1286, 17060), (1706, 12860), (2572, 8530), (3215, 6824), (3412, 6430), (4265, 5144)]