21045381

素因数分解:

$3^1\times 7^1\times {\mathrm{619}}^1\times {\mathrm{1619}}^1$

素因数の和:2248

約数の個数: 16

約数和(自身を含む): 32140800

約数和(自身を除く): 11095419

約数列:

[1, 3, 7, 21, 619, 1619, 1857, 4333, 4857, 11333, 12999, 33999, 1002161, 3006483, 7015127, 21045381]

約数ペア:

[(1, 21045381), (3, 7015127), (7, 3006483), (21, 1002161), (619, 33999), (1619, 12999), (1857, 11333), (4333, 4857)]