21806480

素因数分解:

$2^4\times 5^1\times {\mathrm{272581}}^1$

素因数の和:272594

約数の個数: 20

約数和(自身を含む): 50700252

約数和(自身を除く): 28893772

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 272581, 545162, 1090324, 1362905, 2180648, 2725810, 4361296, 5451620, 10903240, 21806480]

約数ペア:

[(1, 21806480), (2, 10903240), (4, 5451620), (5, 4361296), (8, 2725810), (10, 2180648), (16, 1362905), (20, 1090324), (40, 545162), (80, 272581)]