21263240

素因数分解:

$2^3\times 5^1\times {\mathrm{531581}}^1$

素因数の和:531592

約数の個数: 16

約数和(自身を含む): 47842380

約数和(自身を除く): 26579140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531581, 1063162, 2126324, 2657905, 4252648, 5315810, 10631620, 21263240]

約数ペア:

[(1, 21263240), (2, 10631620), (4, 5315810), (5, 4252648), (8, 2657905), (10, 2126324), (20, 1063162), (40, 531581)]