21597471

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{18043}}^1$

素因数の和:18075

約数の個数: 24

約数和(自身を含む): 37531520

約数和(自身を除く): 15934049

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 18043, 54129, 126301, 162387, 342817, 378903, 1028451, 1136709, 2399719, 3085353, 7199157, 21597471]

約数ペア:

[(1, 21597471), (3, 7199157), (7, 3085353), (9, 2399719), (19, 1136709), (21, 1028451), (57, 378903), (63, 342817), (133, 162387), (171, 126301), (399, 54129), (1197, 18043)]