21290025

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{9157}}^1$

素因数の和:9201

約数の個数: 24

約数和(自身を含む): 36338944

約数和(自身を除く): 15048919

約数列:

[1, 3, 5, 15, 25, 31, 75, 93, 155, 465, 775, 2325, 9157, 27471, 45785, 137355, 228925, 283867, 686775, 851601, 1419335, 4258005, 7096675, 21290025]

約数ペア:

[(1, 21290025), (3, 7096675), (5, 4258005), (15, 1419335), (25, 851601), (31, 686775), (75, 283867), (93, 228925), (155, 137355), (465, 45785), (775, 27471), (2325, 9157)]