21250815

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{701}}^1$

素因数の和:799

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 14332161

約数列:

[1, 3, 5, 15, 43, 47, 129, 141, 215, 235, 645, 701, 705, 2021, 2103, 3505, 6063, 10105, 10515, 30143, 30315, 32947, 90429, 98841, 150715, 164735, 452145, 494205, 1416721, 4250163, 7083605, 21250815]

約数ペア:

[(1, 21250815), (3, 7083605), (5, 4250163), (15, 1416721), (43, 494205), (47, 452145), (129, 164735), (141, 150715), (215, 98841), (235, 90429), (645, 32947), (701, 30315), (705, 30143), (2021, 10515), (2103, 10105), (3505, 6063)]