21170925

素因数分解:

$3^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{4091}}^1$

素因数の和:4130

約数の個数: 36

約数和(自身を含む): 39577824

約数和(自身を除く): 18406899

約数列:

[1, 3, 5, 9, 15, 23, 25, 45, 69, 75, 115, 207, 225, 345, 575, 1035, 1725, 4091, 5175, 12273, 20455, 36819, 61365, 94093, 102275, 184095, 282279, 306825, 470465, 846837, 920475, 1411395, 2352325, 4234185, 7056975, 21170925]

約数ペア:

[(1, 21170925), (3, 7056975), (5, 4234185), (9, 2352325), (15, 1411395), (23, 920475), (25, 846837), (45, 470465), (69, 306825), (75, 282279), (115, 184095), (207, 102275), (225, 94093), (345, 61365), (575, 36819), (1035, 20455), (1725, 12273), (4091, 5175)]