81730971

素因数分解:

$3^3\times 7^2\times {\mathrm{163}}^1\times {\mathrm{379}}^1$

素因数の和:565

約数の個数: 48

約数和(自身を含む): 142089600

約数和(自身を除く): 60358629

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 163, 189, 379, 441, 489, 1137, 1141, 1323, 1467, 2653, 3411, 3423, 4401, 7959, 7987, 10233, 10269, 18571, 23877, 23961, 30807, 55713, 61777, 71631, 71883, 167139, 185331, 215649, 432439, 501417, 555993, 1297317, 1667979, 3027073, 3891951, 9081219, 11675853, 27243657, 81730971]

約数ペア:

[(1, 81730971), (3, 27243657), (7, 11675853), (9, 9081219), (21, 3891951), (27, 3027073), (49, 1667979), (63, 1297317), (147, 555993), (163, 501417), (189, 432439), (379, 215649), (441, 185331), (489, 167139), (1137, 71883), (1141, 71631), (1323, 61777), (1467, 55713), (2653, 30807), (3411, 23961), (3423, 23877), (4401, 18571), (7959, 10269), (7987, 10233)]