81390813

素因数分解:

$3^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:247

約数の個数: 64

約数和(自身を含む): 139776000

約数和(自身を除く): 58385187

約数列:

[1, 3, 7, 19, 21, 23, 49, 57, 69, 133, 147, 161, 181, 343, 399, 437, 483, 543, 931, 1029, 1127, 1267, 1311, 2793, 3059, 3381, 3439, 3801, 4163, 6517, 7889, 8869, 9177, 10317, 12489, 19551, 21413, 23667, 24073, 26607, 29141, 62083, 64239, 72219, 79097, 87423, 149891, 168511, 186249, 203987, 237291, 449673, 505533, 553679, 611961, 1179577, 1427909, 1661037, 3538731, 3875753, 4283727, 11627259, 27130271, 81390813]

約数ペア:

[(1, 81390813), (3, 27130271), (7, 11627259), (19, 4283727), (21, 3875753), (23, 3538731), (49, 1661037), (57, 1427909), (69, 1179577), (133, 611961), (147, 553679), (161, 505533), (181, 449673), (343, 237291), (399, 203987), (437, 186249), (483, 168511), (543, 149891), (931, 87423), (1029, 79097), (1127, 72219), (1267, 64239), (1311, 62083), (2793, 29141), (3059, 26607), (3381, 24073), (3439, 23667), (3801, 21413), (4163, 19551), (6517, 12489), (7889, 10317), (8869, 9177)]