685420

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{797}}^1$

素因数の和:849

約数の個数: 24

約数和(自身を含む): 1474704

約数和(自身を除く): 789284

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 797, 860, 1594, 3188, 3985, 7970, 15940, 34271, 68542, 137084, 171355, 342710, 685420]

約数ペア:

[(1, 685420), (2, 342710), (4, 171355), (5, 137084), (10, 68542), (20, 34271), (43, 15940), (86, 7970), (172, 3985), (215, 3188), (430, 1594), (797, 860)]