21427679

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{307}}^1$

素因数の和:399

約数の個数: 24

約数和(自身を含む): 27054720

約数和(自身を除く): 5627041

約数列:

[1, 7, 13, 59, 91, 169, 307, 413, 767, 1183, 2149, 3991, 5369, 9971, 18113, 27937, 51883, 69797, 126791, 235469, 363181, 1648283, 3061097, 21427679]

約数ペア:

[(1, 21427679), (7, 3061097), (13, 1648283), (59, 363181), (91, 235469), (169, 126791), (307, 69797), (413, 51883), (767, 27937), (1183, 18113), (2149, 9971), (3991, 5369)]