19401980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{74623}}^1$

素因数の和:74645

約数の個数: 24

約数和(自身を含む): 43878912

約数和(自身を除く): 24476932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 74623, 149246, 298492, 373115, 746230, 970099, 1492460, 1940198, 3880396, 4850495, 9700990, 19401980]

約数ペア:

[(1, 19401980), (2, 9700990), (4, 4850495), (5, 3880396), (10, 1940198), (13, 1492460), (20, 970099), (26, 746230), (52, 373115), (65, 298492), (130, 149246), (260, 74623)]