19938171

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{241}}^1$

素因数の和:387

約数の個数: 32

約数和(自身を含む): 30666240

約数和(自身を除く): 10728069

約数列:

[1, 3, 11, 23, 33, 69, 109, 241, 253, 327, 723, 759, 1199, 2507, 2651, 3597, 5543, 7521, 7953, 16629, 26269, 27577, 60973, 78807, 82731, 182919, 288959, 604187, 866877, 1812561, 6646057, 19938171]

約数ペア:

[(1, 19938171), (3, 6646057), (11, 1812561), (23, 866877), (33, 604187), (69, 288959), (109, 182919), (241, 82731), (253, 78807), (327, 60973), (723, 27577), (759, 26269), (1199, 16629), (2507, 7953), (2651, 7521), (3597, 5543)]