21809875

素因数分解:

$5^3\times {\mathrm{149}}^1\times {\mathrm{1171}}^1$

素因数の和:1335

約数の個数: 16

約数和(自身を含む): 27424800

約数和(自身を除く): 5614925

約数列:

[1, 5, 25, 125, 149, 745, 1171, 3725, 5855, 18625, 29275, 146375, 174479, 872395, 4361975, 21809875]

約数ペア:

[(1, 21809875), (5, 4361975), (25, 872395), (125, 174479), (149, 146375), (745, 29275), (1171, 18625), (3725, 5855)]