21286480

素因数分解:

$2^4\times 5^1\times {\mathrm{266081}}^1$

素因数の和:266094

約数の個数: 20

約数和(自身を含む): 49491252

約数和(自身を除く): 28204772

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266081, 532162, 1064324, 1330405, 2128648, 2660810, 4257296, 5321620, 10643240, 21286480]

約数ペア:

[(1, 21286480), (2, 10643240), (4, 5321620), (5, 4257296), (8, 2660810), (10, 2128648), (16, 1330405), (20, 1064324), (40, 532162), (80, 266081)]