20990290

素因数分解:

$2^1\times 5^1\times {\mathrm{619}}^1\times {\mathrm{3391}}^1$

素因数の和:4017

約数の個数: 16

約数和(自身を含む): 37854720

約数和(自身を除く): 16864430

約数列:

[1, 2, 5, 10, 619, 1238, 3095, 3391, 6190, 6782, 16955, 33910, 2099029, 4198058, 10495145, 20990290]

約数ペア:

[(1, 20990290), (2, 10495145), (5, 4198058), (10, 2099029), (619, 33910), (1238, 16955), (3095, 6782), (3391, 6190)]