18985921

素因数分解:

${\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{239}}^1$

素因数の和:408

約数の個数: 16

約数和(自身を含む): 20793600

約数和(自身を除く): 1807679

約数列:

[1, 19, 37, 113, 239, 703, 2147, 4181, 4541, 8843, 27007, 79439, 168017, 513133, 999259, 18985921]

約数ペア:

[(1, 18985921), (19, 999259), (37, 513133), (113, 168017), (239, 79439), (703, 27007), (2147, 8843), (4181, 4541)]