81738880

素因数分解:

$2^7\times 5^1\times {\mathrm{127717}}^1$

素因数の和:127736

約数の個数: 32

約数和(自身を含む): 195408540

約数和(自身を除く): 113669660

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127717, 255434, 510868, 638585, 1021736, 1277170, 2043472, 2554340, 4086944, 5108680, 8173888, 10217360, 16347776, 20434720, 40869440, 81738880]

約数ペア:

[(1, 81738880), (2, 40869440), (4, 20434720), (5, 16347776), (8, 10217360), (10, 8173888), (16, 5108680), (20, 4086944), (32, 2554340), (40, 2043472), (64, 1277170), (80, 1021736), (128, 638585), (160, 510868), (320, 255434), (640, 127717)]