15997900

素因数分解:

$2^2\times 5^2\times {\mathrm{159979}}^1$

素因数の和:159993

約数の個数: 18

約数和(自身を含む): 34715660

約数和(自身を除く): 18717760

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 159979, 319958, 639916, 799895, 1599790, 3199580, 3999475, 7998950, 15997900]

約数ペア:

[(1, 15997900), (2, 7998950), (4, 3999475), (5, 3199580), (10, 1599790), (20, 799895), (25, 639916), (50, 319958), (100, 159979)]