21290085

素因数分解:

$3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6481}}^1$

素因数の和:6565

約数の個数: 24

約数和(自身を含む): 37414104

約数和(自身を除く): 16124019

約数列:

[1, 3, 5, 9, 15, 45, 73, 219, 365, 657, 1095, 3285, 6481, 19443, 32405, 58329, 97215, 291645, 473113, 1419339, 2365565, 4258017, 7096695, 21290085]

約数ペア:

[(1, 21290085), (3, 7096695), (5, 4258017), (9, 2365565), (15, 1419339), (45, 473113), (73, 291645), (219, 97215), (365, 58329), (657, 32405), (1095, 19443), (3285, 6481)]