20578870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{509}}^1$

素因数の和:840

約数の個数: 32

約数和(自身を含む): 40098240

約数和(自身を除く): 19519370

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 311, 509, 622, 1018, 1555, 2545, 3110, 4043, 5090, 6617, 8086, 13234, 20215, 33085, 40430, 66170, 158299, 316598, 791495, 1582990, 2057887, 4115774, 10289435, 20578870]

約数ペア:

[(1, 20578870), (2, 10289435), (5, 4115774), (10, 2057887), (13, 1582990), (26, 791495), (65, 316598), (130, 158299), (311, 66170), (509, 40430), (622, 33085), (1018, 20215), (1555, 13234), (2545, 8086), (3110, 6617), (4043, 5090)]