20985375

素因数分解:

$3^1\times 5^3\times {\mathrm{107}}^1\times {\mathrm{523}}^1$

素因数の和:648

約数の個数: 32

約数和(自身を含む): 35313408

約数和(自身を除く): 14328033

約数列:

[1, 3, 5, 15, 25, 75, 107, 125, 321, 375, 523, 535, 1569, 1605, 2615, 2675, 7845, 8025, 13075, 13375, 39225, 40125, 55961, 65375, 167883, 196125, 279805, 839415, 1399025, 4197075, 6995125, 20985375]

約数ペア:

[(1, 20985375), (3, 6995125), (5, 4197075), (15, 1399025), (25, 839415), (75, 279805), (107, 196125), (125, 167883), (321, 65375), (375, 55961), (523, 40125), (535, 39225), (1569, 13375), (1605, 13075), (2615, 8025), (2675, 7845)]