21133815

素因数分解:

$3^1\times 5^1\times {\mathrm{971}}^1\times {\mathrm{1451}}^1$

素因数の和:2430

約数の個数: 16

約数和(自身を含む): 33872256

約数和(自身を除く): 12738441

約数列:

[1, 3, 5, 15, 971, 1451, 2913, 4353, 4855, 7255, 14565, 21765, 1408921, 4226763, 7044605, 21133815]

約数ペア:

[(1, 21133815), (3, 7044605), (5, 4226763), (15, 1408921), (971, 21765), (1451, 14565), (2913, 7255), (4353, 4855)]