20534540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78979}}^1$

素因数の和:79001

約数の個数: 24

約数和(自身を含む): 46440240

約数和(自身を除く): 25905700

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78979, 157958, 315916, 394895, 789790, 1026727, 1579580, 2053454, 4106908, 5133635, 10267270, 20534540]

約数ペア:

[(1, 20534540), (2, 10267270), (4, 5133635), (5, 4106908), (10, 2053454), (13, 1579580), (20, 1026727), (26, 789790), (52, 394895), (65, 315916), (130, 157958), (260, 78979)]