21536875

素因数分解:

$5^4\times {\mathrm{17}}^1\times {\mathrm{2027}}^1$

素因数の和:2064

約数の個数: 20

約数和(自身を含む): 28509624

約数和(自身を除く): 6972749

約数列:

[1, 5, 17, 25, 85, 125, 425, 625, 2027, 2125, 10135, 10625, 34459, 50675, 172295, 253375, 861475, 1266875, 4307375, 21536875]

約数ペア:

[(1, 21536875), (5, 4307375), (17, 1266875), (25, 861475), (85, 253375), (125, 172295), (425, 50675), (625, 34459), (2027, 10625), (2125, 10135)]