64947220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{249797}}^1$

素因数の和:249819

約数の個数: 24

約数和(自身を含む): 146881224

約数和(自身を除く): 81934004

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 249797, 499594, 999188, 1248985, 2497970, 3247361, 4995940, 6494722, 12989444, 16236805, 32473610, 64947220]

約数ペア:

[(1, 64947220), (2, 32473610), (4, 16236805), (5, 12989444), (10, 6494722), (13, 4995940), (20, 3247361), (26, 2497970), (52, 1248985), (65, 999188), (130, 499594), (260, 249797)]