39997900

素因数分解:

$2^2\times 5^2\times {\mathrm{399979}}^1$

素因数の和:399993

約数の個数: 18

約数和(自身を含む): 86795660

約数和(自身を除く): 46797760

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 399979, 799958, 1599916, 1999895, 3999790, 7999580, 9999475, 19998950, 39997900]

約数ペア:

[(1, 39997900), (2, 19998950), (4, 9999475), (5, 7999580), (10, 3999790), (20, 1999895), (25, 1599916), (50, 799958), (100, 399979)]