20347725

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{15959}}^1$

素因数の和:15989

約数の個数: 24

約数和(自身を含む): 35622720

約数和(自身を除く): 15274995

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 15959, 47877, 79795, 239385, 271303, 398975, 813909, 1196925, 1356515, 4069545, 6782575, 20347725]

約数ペア:

[(1, 20347725), (3, 6782575), (5, 4069545), (15, 1356515), (17, 1196925), (25, 813909), (51, 398975), (75, 271303), (85, 239385), (255, 79795), (425, 47877), (1275, 15959)]