19996490

素因数分解:

$2^1\times 5^1\times {\mathrm{1249}}^1\times {\mathrm{1601}}^1$

素因数の和:2857

約数の個数: 16

約数和(自身を含む): 36045000

約数和(自身を除く): 16048510

約数列:

[1, 2, 5, 10, 1249, 1601, 2498, 3202, 6245, 8005, 12490, 16010, 1999649, 3999298, 9998245, 19996490]

約数ペア:

[(1, 19996490), (2, 9998245), (5, 3999298), (10, 1999649), (1249, 16010), (1601, 12490), (2498, 8005), (3202, 6245)]