20871955

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{3001}}^1$

素因数の和:3126

約数の個数: 16

約数和(自身を含む): 27234144

約数和(自身を除く): 6362189

約数列:

[1, 5, 13, 65, 107, 535, 1391, 3001, 6955, 15005, 39013, 195065, 321107, 1605535, 4174391, 20871955]

約数ペア:

[(1, 20871955), (5, 4174391), (13, 1605535), (65, 321107), (107, 195065), (535, 39013), (1391, 15005), (3001, 6955)]