20561331

素因数分解:

$3^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{2293}}^1$

素因数の和:2371

約数の個数: 24

約数和(自身を含む): 32427984

約数和(自身を除く): 11866653

約数列:

[1, 3, 7, 21, 49, 61, 147, 183, 427, 1281, 2293, 2989, 6879, 8967, 16051, 48153, 112357, 139873, 337071, 419619, 979111, 2937333, 6853777, 20561331]

約数ペア:

[(1, 20561331), (3, 6853777), (7, 2937333), (21, 979111), (49, 419619), (61, 337071), (147, 139873), (183, 112357), (427, 48153), (1281, 16051), (2293, 8967), (2989, 6879)]