20787325

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{383}}^1$

素因数の和:573

約数の個数: 24

約数和(自身を含む): 27998208

約数和(自身を除く): 7210883

約数列:

[1, 5, 13, 25, 65, 167, 325, 383, 835, 1915, 2171, 4175, 4979, 9575, 10855, 24895, 54275, 63961, 124475, 319805, 831493, 1599025, 4157465, 20787325]

約数ペア:

[(1, 20787325), (5, 4157465), (13, 1599025), (25, 831493), (65, 319805), (167, 124475), (325, 63961), (383, 54275), (835, 24895), (1915, 10855), (2171, 9575), (4175, 4979)]