28364775

素因数分解:

$3^1\times 5^2\times {\mathrm{131}}^1\times {\mathrm{2887}}^1$

素因数の和:3031

約数の個数: 24

約数和(自身を含む): 47270784

約数和(自身を除く): 18906009

約数列:

[1, 3, 5, 15, 25, 75, 131, 393, 655, 1965, 2887, 3275, 8661, 9825, 14435, 43305, 72175, 216525, 378197, 1134591, 1890985, 5672955, 9454925, 28364775]

約数ペア:

[(1, 28364775), (3, 9454925), (5, 5672955), (15, 1890985), (25, 1134591), (75, 378197), (131, 216525), (393, 72175), (655, 43305), (1965, 14435), (2887, 9825), (3275, 8661)]