81303860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{21739}}^1$

素因数の和:21776

約数の個数: 48

約数和(自身を含む): 197225280

約数和(自身を除く): 115921420

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 21739, 43478, 86956, 108695, 217390, 239129, 369563, 434780, 478258, 739126, 956516, 1195645, 1478252, 1847815, 2391290, 3695630, 4065193, 4782580, 7391260, 8130386, 16260772, 20325965, 40651930, 81303860]

約数ペア:

[(1, 81303860), (2, 40651930), (4, 20325965), (5, 16260772), (10, 8130386), (11, 7391260), (17, 4782580), (20, 4065193), (22, 3695630), (34, 2391290), (44, 1847815), (55, 1478252), (68, 1195645), (85, 956516), (110, 739126), (170, 478258), (187, 434780), (220, 369563), (340, 239129), (374, 217390), (748, 108695), (935, 86956), (1870, 43478), (3740, 21739)]