20556980

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{3821}}^1$

素因数の和:4099

約数の個数: 24

約数和(自身を含む): 43341480

約数和(自身を除く): 22784500

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 3821, 5380, 7642, 15284, 19105, 38210, 76420, 1027849, 2055698, 4111396, 5139245, 10278490, 20556980]

約数ペア:

[(1, 20556980), (2, 10278490), (4, 5139245), (5, 4111396), (10, 2055698), (20, 1027849), (269, 76420), (538, 38210), (1076, 19105), (1345, 15284), (2690, 7642), (3821, 5380)]