21980360

素因数分解:

$2^3\times 5^1\times {\mathrm{549509}}^1$

素因数の和:549520

約数の個数: 16

約数和(自身を含む): 49455900

約数和(自身を除く): 27475540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 549509, 1099018, 2198036, 2747545, 4396072, 5495090, 10990180, 21980360]

約数ペア:

[(1, 21980360), (2, 10990180), (4, 5495090), (5, 4396072), (8, 2747545), (10, 2198036), (20, 1099018), (40, 549509)]