19921875

素因数分解:

$3^1\times 5^8\times {\mathrm{17}}^1$

素因数の和:60

約数の個数: 36

約数和(自身を含む): 35156232

約数和(自身を除く): 15234357

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 125, 255, 375, 425, 625, 1275, 1875, 2125, 3125, 6375, 9375, 10625, 15625, 31875, 46875, 53125, 78125, 159375, 234375, 265625, 390625, 796875, 1171875, 1328125, 3984375, 6640625, 19921875]

約数ペア:

[(1, 19921875), (3, 6640625), (5, 3984375), (15, 1328125), (17, 1171875), (25, 796875), (51, 390625), (75, 265625), (85, 234375), (125, 159375), (255, 78125), (375, 53125), (425, 46875), (625, 31875), (1275, 15625), (1875, 10625), (2125, 9375), (3125, 6375)]