21278778

素因数分解:

$2^1\times 3^1\times {\mathrm{523}}^1\times {\mathrm{6781}}^1$

素因数の和:7309

約数の個数: 16

約数和(自身を含む): 42645216

約数和(自身を除く): 21366438

約数列:

[1, 2, 3, 6, 523, 1046, 1569, 3138, 6781, 13562, 20343, 40686, 3546463, 7092926, 10639389, 21278778]

約数ペア:

[(1, 21278778), (2, 10639389), (3, 7092926), (6, 3546463), (523, 40686), (1046, 20343), (1569, 13562), (3138, 6781)]