20507403

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{499}}^1$

素因数の和:631

約数の個数: 32

約数和(自身を含む): 33280000

約数和(自身を除く): 12772597

約数列:

[1, 3, 7, 19, 21, 57, 103, 133, 309, 399, 499, 721, 1497, 1957, 2163, 3493, 5871, 9481, 10479, 13699, 28443, 41097, 51397, 66367, 154191, 199101, 359779, 976543, 1079337, 2929629, 6835801, 20507403]

約数ペア:

[(1, 20507403), (3, 6835801), (7, 2929629), (19, 1079337), (21, 976543), (57, 359779), (103, 199101), (133, 154191), (309, 66367), (399, 51397), (499, 41097), (721, 28443), (1497, 13699), (1957, 10479), (2163, 9481), (3493, 5871)]