313640720

素因数分解:

$2^4\times 5^1\times {\mathrm{3920509}}^1$

素因数の和:3920522

約数の個数: 20

約数和(自身を含む): 729214860

約数和(自身を除く): 415574140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3920509, 7841018, 15682036, 19602545, 31364072, 39205090, 62728144, 78410180, 156820360, 313640720]

約数ペア:

[(1, 313640720), (2, 156820360), (4, 78410180), (5, 62728144), (8, 39205090), (10, 31364072), (16, 19602545), (20, 15682036), (40, 7841018), (80, 3920509)]