20768139

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4643}}^1$

素因数の和:4727

約数の個数: 24

約数和(自身を含む): 34774272

約数和(自身を除く): 14006133

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4643, 13929, 32501, 41787, 97503, 292509, 329653, 988959, 2307571, 2966877, 6922713, 20768139]

約数ペア:

[(1, 20768139), (3, 6922713), (7, 2966877), (9, 2307571), (21, 988959), (63, 329653), (71, 292509), (213, 97503), (497, 41787), (639, 32501), (1491, 13929), (4473, 4643)]