81190840

素因数分解:

$2^3\times 5^1\times {\mathrm{1307}}^1\times {\mathrm{1553}}^1$

素因数の和:2871

約数の個数: 32

約数和(自身を含む): 182936880

約数和(自身を除く): 101746040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1307, 1553, 2614, 3106, 5228, 6212, 6535, 7765, 10456, 12424, 13070, 15530, 26140, 31060, 52280, 62120, 2029771, 4059542, 8119084, 10148855, 16238168, 20297710, 40595420, 81190840]

約数ペア:

[(1, 81190840), (2, 40595420), (4, 20297710), (5, 16238168), (8, 10148855), (10, 8119084), (20, 4059542), (40, 2029771), (1307, 62120), (1553, 52280), (2614, 31060), (3106, 26140), (5228, 15530), (6212, 13070), (6535, 12424), (7765, 10456)]