81381981

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:441

約数の個数: 32

約数和(自身を含む): 117669888

約数和(自身を除く): 36287907

約数列:

[1, 3, 23, 37, 69, 111, 127, 251, 381, 753, 851, 2553, 2921, 4699, 5773, 8763, 9287, 14097, 17319, 27861, 31877, 95631, 108077, 213601, 324231, 640803, 733171, 1179449, 2199513, 3538347, 27127327, 81381981]

約数ペア:

[(1, 81381981), (3, 27127327), (23, 3538347), (37, 2199513), (69, 1179449), (111, 733171), (127, 640803), (251, 324231), (381, 213601), (753, 108077), (851, 95631), (2553, 31877), (2921, 27861), (4699, 17319), (5773, 14097), (8763, 9287)]