20900997

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{863}}^1$

素因数の和:911

約数の個数: 40

約数和(自身を含む): 35126784

約数和(自身を除く): 14225787

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 81, 117, 207, 299, 351, 621, 863, 897, 1053, 1863, 2589, 2691, 7767, 8073, 11219, 19849, 23301, 24219, 33657, 59547, 69903, 100971, 178641, 258037, 302913, 535923, 774111, 908739, 1607769, 2322333, 6966999, 20900997]

約数ペア:

[(1, 20900997), (3, 6966999), (9, 2322333), (13, 1607769), (23, 908739), (27, 774111), (39, 535923), (69, 302913), (81, 258037), (117, 178641), (207, 100971), (299, 69903), (351, 59547), (621, 33657), (863, 24219), (897, 23301), (1053, 19849), (1863, 11219), (2589, 8073), (2691, 7767)]