20996871

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:551

約数の個数: 32

約数和(自身を含む): 33474048

約数和(自身を除く): 12477177

約数列:

[1, 3, 7, 21, 37, 61, 111, 183, 259, 427, 443, 777, 1281, 1329, 2257, 3101, 6771, 9303, 15799, 16391, 27023, 47397, 49173, 81069, 114737, 189161, 344211, 567483, 999851, 2999553, 6998957, 20996871]

約数ペア:

[(1, 20996871), (3, 6998957), (7, 2999553), (21, 999851), (37, 567483), (61, 344211), (111, 189161), (183, 114737), (259, 81069), (427, 49173), (443, 47397), (777, 27023), (1281, 16391), (1329, 15799), (2257, 9303), (3101, 6771)]