17889940

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{21817}}^1$

素因数の和:21867

約数の個数: 24

約数和(自身を含む): 38486952

約数和(自身を除く): 20597012

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 21817, 43634, 87268, 109085, 218170, 436340, 894497, 1788994, 3577988, 4472485, 8944970, 17889940]

約数ペア:

[(1, 17889940), (2, 8944970), (4, 4472485), (5, 3577988), (10, 1788994), (20, 894497), (41, 436340), (82, 218170), (164, 109085), (205, 87268), (410, 43634), (820, 21817)]