81531999

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{457}}^1\times {\mathrm{461}}^1$

素因数の和:967

約数の個数: 24

約数和(自身を含む): 121032912

約数和(自身を除く): 39500913

約数列:

[1, 3, 9, 43, 129, 387, 457, 461, 1371, 1383, 4113, 4149, 19651, 19823, 58953, 59469, 176859, 178407, 210677, 632031, 1896093, 9059111, 27177333, 81531999]

約数ペア:

[(1, 81531999), (3, 27177333), (9, 9059111), (43, 1896093), (129, 632031), (387, 210677), (457, 178407), (461, 176859), (1371, 59469), (1383, 58953), (4113, 19823), (4149, 19651)]