20525775

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{163}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 36116736

約数和(自身を除く): 15590961

約数列:

[1, 3, 5, 15, 23, 25, 69, 73, 75, 115, 163, 219, 345, 365, 489, 575, 815, 1095, 1679, 1725, 1825, 2445, 3749, 4075, 5037, 5475, 8395, 11247, 11899, 12225, 18745, 25185, 35697, 41975, 56235, 59495, 93725, 125925, 178485, 273677, 281175, 297475, 821031, 892425, 1368385, 4105155, 6841925, 20525775]

約数ペア:

[(1, 20525775), (3, 6841925), (5, 4105155), (15, 1368385), (23, 892425), (25, 821031), (69, 297475), (73, 281175), (75, 273677), (115, 178485), (163, 125925), (219, 93725), (345, 59495), (365, 56235), (489, 41975), (575, 35697), (815, 25185), (1095, 18745), (1679, 12225), (1725, 11899), (1825, 11247), (2445, 8395), (3749, 5475), (4075, 5037)]