21397725

素因数分解:

$3^2\times 5^2\times {\mathrm{95101}}^1$

素因数の和:95117

約数の個数: 18

約数和(自身を含む): 38326106

約数和(自身を除く): 16928381

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 95101, 285303, 475505, 855909, 1426515, 2377525, 4279545, 7132575, 21397725]

約数ペア:

[(1, 21397725), (3, 7132575), (5, 4279545), (9, 2377525), (15, 1426515), (25, 855909), (45, 475505), (75, 285303), (225, 95101)]