20178985

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1\times {\mathrm{617}}^1$

素因数の和:864

約数の個数: 16

約数和(自身を含む): 25155072

約数和(自身を除く): 4976087

約数列:

[1, 5, 31, 155, 211, 617, 1055, 3085, 6541, 19127, 32705, 95635, 130187, 650935, 4035797, 20178985]

約数ペア:

[(1, 20178985), (5, 4035797), (31, 650935), (155, 130187), (211, 95635), (617, 32705), (1055, 19127), (3085, 6541)]