21369411

素因数分解:

$3^2\times 7^1\times {\mathrm{431}}^1\times {\mathrm{787}}^1$

素因数の和:1231

約数の個数: 24

約数和(自身を含む): 35403264

約数和(自身を除く): 14033853

約数列:

[1, 3, 7, 9, 21, 63, 431, 787, 1293, 2361, 3017, 3879, 5509, 7083, 9051, 16527, 27153, 49581, 339197, 1017591, 2374379, 3052773, 7123137, 21369411]

約数ペア:

[(1, 21369411), (3, 7123137), (7, 3052773), (9, 2374379), (21, 1017591), (63, 339197), (431, 49581), (787, 27153), (1293, 16527), (2361, 9051), (3017, 7083), (3879, 5509)]