20117181

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{397}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 32604160

約数和(自身を除く): 12486979

約数列:

[1, 3, 7, 19, 21, 57, 127, 133, 381, 397, 399, 889, 1191, 2413, 2667, 2779, 7239, 7543, 8337, 16891, 22629, 50419, 50673, 52801, 151257, 158403, 352933, 957961, 1058799, 2873883, 6705727, 20117181]

約数ペア:

[(1, 20117181), (3, 6705727), (7, 2873883), (19, 1058799), (21, 957961), (57, 352933), (127, 158403), (133, 151257), (381, 52801), (397, 50673), (399, 50419), (889, 22629), (1191, 16891), (2413, 8337), (2667, 7543), (2779, 7239)]