20400165

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{11057}}^1$

素因数の和:11109

約数の個数: 24

約数和(自身を含む): 36226008

約数和(自身を除く): 15825843

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, 1845, 11057, 33171, 55285, 99513, 165855, 453337, 497565, 1360011, 2266685, 4080033, 6800055, 20400165]

約数ペア:

[(1, 20400165), (3, 6800055), (5, 4080033), (9, 2266685), (15, 1360011), (41, 497565), (45, 453337), (123, 165855), (205, 99513), (369, 55285), (615, 33171), (1845, 11057)]