21335967

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:365

約数の個数: 40

約数和(自身を含む): 34151040

約数和(自身を除く): 12815073

約数列:

[1, 3, 9, 27, 29, 31, 81, 87, 93, 261, 279, 293, 783, 837, 879, 899, 2349, 2511, 2637, 2697, 7911, 8091, 8497, 9083, 23733, 24273, 25491, 27249, 72819, 76473, 81747, 229419, 245241, 263407, 688257, 735723, 790221, 2370663, 7111989, 21335967]

約数ペア:

[(1, 21335967), (3, 7111989), (9, 2370663), (27, 790221), (29, 735723), (31, 688257), (81, 263407), (87, 245241), (93, 229419), (261, 81747), (279, 76473), (293, 72819), (783, 27249), (837, 25491), (879, 24273), (899, 23733), (2349, 9083), (2511, 8497), (2637, 8091), (2697, 7911)]