20931975

素因数分解:

$3^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{3001}}^1$

素因数の和:3048

約数の個数: 36

約数和(自身を含む): 38713792

約数和(自身を除く): 17781817

約数列:

[1, 3, 5, 9, 15, 25, 31, 45, 75, 93, 155, 225, 279, 465, 775, 1395, 2325, 3001, 6975, 9003, 15005, 27009, 45015, 75025, 93031, 135045, 225075, 279093, 465155, 675225, 837279, 1395465, 2325775, 4186395, 6977325, 20931975]

約数ペア:

[(1, 20931975), (3, 6977325), (5, 4186395), (9, 2325775), (15, 1395465), (25, 837279), (31, 675225), (45, 465155), (75, 279093), (93, 225075), (155, 135045), (225, 93031), (279, 75025), (465, 45015), (775, 27009), (1395, 15005), (2325, 9003), (3001, 6975)]