644679

素因数分解:

$3^5\times 7^1\times {\mathrm{379}}^1$

素因数の和:401

約数の個数: 24

約数和(自身を含む): 1106560

約数和(自身を除く): 461881

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 379, 567, 1137, 1701, 2653, 3411, 7959, 10233, 23877, 30699, 71631, 92097, 214893, 644679]

約数ペア:

[(1, 644679), (3, 214893), (7, 92097), (9, 71631), (21, 30699), (27, 23877), (63, 10233), (81, 7959), (189, 3411), (243, 2653), (379, 1701), (567, 1137)]