20997315

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12611}}^1$

素因数の和:12659

約数の個数: 24

約数和(自身を含む): 37381968

約数和(自身を除く): 16384653

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12611, 37833, 63055, 113499, 189165, 466607, 567495, 1399821, 2333035, 4199463, 6999105, 20997315]

約数ペア:

[(1, 20997315), (3, 6999105), (5, 4199463), (9, 2333035), (15, 1399821), (37, 567495), (45, 466607), (111, 189165), (185, 113499), (333, 63055), (555, 37833), (1665, 12611)]