21428307

素因数分解:

$3^4\times {\mathrm{137}}^1\times {\mathrm{1931}}^1$

素因数の和:2080

約数の個数: 20

約数和(自身を含む): 32260536

約数和(自身を除く): 10832229

約数列:

[1, 3, 9, 27, 81, 137, 411, 1233, 1931, 3699, 5793, 11097, 17379, 52137, 156411, 264547, 793641, 2380923, 7142769, 21428307]

約数ペア:

[(1, 21428307), (3, 7142769), (9, 2380923), (27, 793641), (81, 264547), (137, 156411), (411, 52137), (1233, 17379), (1931, 11097), (3699, 5793)]