20815395

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{81629}}^1$

素因数の和:81654

約数の個数: 16

約数和(自身を含む): 35264160

約数和(自身を除く): 14448765

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 81629, 244887, 408145, 1224435, 1387693, 4163079, 6938465, 20815395]

約数ペア:

[(1, 20815395), (3, 6938465), (5, 4163079), (15, 1387693), (17, 1224435), (51, 408145), (85, 244887), (255, 81629)]