21217095

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{12743}}^1$

素因数の和:12791

約数の個数: 24

約数和(自身を含む): 37773216

約数和(自身を除く): 16556121

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 185, 333, 555, 1665, 12743, 38229, 63715, 114687, 191145, 471491, 573435, 1414473, 2357455, 4243419, 7072365, 21217095]

約数ペア:

[(1, 21217095), (3, 7072365), (5, 4243419), (9, 2357455), (15, 1414473), (37, 573435), (45, 471491), (111, 191145), (185, 114687), (333, 63715), (555, 38229), (1665, 12743)]