64780280

素因数分解:

$2^3\times 5^1\times {\mathrm{1619507}}^1$

素因数の和:1619518

約数の個数: 16

約数和(自身を含む): 145755720

約数和(自身を除く): 80975440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1619507, 3239014, 6478028, 8097535, 12956056, 16195070, 32390140, 64780280]

約数ペア:

[(1, 64780280), (2, 32390140), (4, 16195070), (5, 12956056), (8, 8097535), (10, 6478028), (20, 3239014), (40, 1619507)]