20623125

素因数分解:

$3^1\times 5^4\times {\mathrm{17}}^1\times {\mathrm{647}}^1$

素因数の和:687

約数の個数: 40

約数和(自身を含む): 36438336

約数和(自身を除く): 15815211

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 125, 255, 375, 425, 625, 647, 1275, 1875, 1941, 2125, 3235, 6375, 9705, 10625, 10999, 16175, 31875, 32997, 48525, 54995, 80875, 164985, 242625, 274975, 404375, 824925, 1213125, 1374875, 4124625, 6874375, 20623125]

約数ペア:

[(1, 20623125), (3, 6874375), (5, 4124625), (15, 1374875), (17, 1213125), (25, 824925), (51, 404375), (75, 274975), (85, 242625), (125, 164985), (255, 80875), (375, 54995), (425, 48525), (625, 32997), (647, 31875), (1275, 16175), (1875, 10999), (1941, 10625), (2125, 9705), (3235, 6375)]