18880390

素因数分解:

$2^1\times 5^1\times {\mathrm{281}}^1\times {\mathrm{6719}}^1$

素因数の和:7007

約数の個数: 16

約数和(自身を含む): 34110720

約数和(自身を除く): 15230330

約数列:

[1, 2, 5, 10, 281, 562, 1405, 2810, 6719, 13438, 33595, 67190, 1888039, 3776078, 9440195, 18880390]

約数ペア:

[(1, 18880390), (2, 9440195), (5, 3776078), (10, 1888039), (281, 67190), (562, 33595), (1405, 13438), (2810, 6719)]