20995605

素因数分解:

$3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{1103}}^1$

素因数の和:1167

約数の個数: 40

約数和(自身を含む): 38472192

約数和(自身を除く): 17476587

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 141, 235, 405, 423, 705, 1103, 1269, 2115, 3309, 3807, 5515, 6345, 9927, 16545, 19035, 29781, 49635, 51841, 89343, 148905, 155523, 259205, 446715, 466569, 777615, 1399707, 2332845, 4199121, 6998535, 20995605]

約数ペア:

[(1, 20995605), (3, 6998535), (5, 4199121), (9, 2332845), (15, 1399707), (27, 777615), (45, 466569), (47, 446715), (81, 259205), (135, 155523), (141, 148905), (235, 89343), (405, 51841), (423, 49635), (705, 29781), (1103, 19035), (1269, 16545), (2115, 9927), (3309, 6345), (3807, 5515)]