20938990

素因数分解:

$2^1\times 5^1\times {\mathrm{521}}^1\times {\mathrm{4019}}^1$

素因数の和:4547

約数の個数: 16

約数和(自身を含む): 37771920

約数和(自身を除く): 16832930

約数列:

[1, 2, 5, 10, 521, 1042, 2605, 4019, 5210, 8038, 20095, 40190, 2093899, 4187798, 10469495, 20938990]

約数ペア:

[(1, 20938990), (2, 10469495), (5, 4187798), (10, 2093899), (521, 40190), (1042, 20095), (2605, 8038), (4019, 5210)]