80997580

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{359}}^1\times {\mathrm{389}}^1$

素因数の和:786

約数の個数: 48

約数和(自身を含む): 176904000

約数和(自身を除く): 95906420

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 359, 389, 580, 718, 778, 1436, 1556, 1795, 1945, 3590, 3890, 7180, 7780, 10411, 11281, 20822, 22562, 41644, 45124, 52055, 56405, 104110, 112810, 139651, 208220, 225620, 279302, 558604, 698255, 1396510, 2793020, 4049879, 8099758, 16199516, 20249395, 40498790, 80997580]

約数ペア:

[(1, 80997580), (2, 40498790), (4, 20249395), (5, 16199516), (10, 8099758), (20, 4049879), (29, 2793020), (58, 1396510), (116, 698255), (145, 558604), (290, 279302), (359, 225620), (389, 208220), (580, 139651), (718, 112810), (778, 104110), (1436, 56405), (1556, 52055), (1795, 45124), (1945, 41644), (3590, 22562), (3890, 20822), (7180, 11281), (7780, 10411)]