20804931

素因数分解:

$3^9\times 7^1\times {\mathrm{151}}^1$

素因数の和:185

約数の個数: 40

約数和(自身を含む): 35901184

約数和(自身を除く): 15096253

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 151, 189, 243, 453, 567, 729, 1057, 1359, 1701, 2187, 3171, 4077, 5103, 6561, 9513, 12231, 15309, 19683, 28539, 36693, 45927, 85617, 110079, 137781, 256851, 330237, 770553, 990711, 2311659, 2972133, 6934977, 20804931]

約数ペア:

[(1, 20804931), (3, 6934977), (7, 2972133), (9, 2311659), (21, 990711), (27, 770553), (63, 330237), (81, 256851), (151, 137781), (189, 110079), (243, 85617), (453, 45927), (567, 36693), (729, 28539), (1057, 19683), (1359, 15309), (1701, 12231), (2187, 9513), (3171, 6561), (4077, 5103)]