21287637

素因数分解:

$3^3\times 7^1\times {\mathrm{163}}^1\times {\mathrm{691}}^1$

素因数の和:870

約数の個数: 32

約数和(自身を含む): 36316160

約数和(自身を除く): 15028523

約数列:

[1, 3, 7, 9, 21, 27, 63, 163, 189, 489, 691, 1141, 1467, 2073, 3423, 4401, 4837, 6219, 10269, 14511, 18657, 30807, 43533, 112633, 130599, 337899, 788431, 1013697, 2365293, 3041091, 7095879, 21287637]

約数ペア:

[(1, 21287637), (3, 7095879), (7, 3041091), (9, 2365293), (21, 1013697), (27, 788431), (63, 337899), (163, 130599), (189, 112633), (489, 43533), (691, 30807), (1141, 18657), (1467, 14511), (2073, 10269), (3423, 6219), (4401, 4837)]