20405091

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{383}}^1$

素因数の和:495

約数の個数: 32

約数和(自身を含む): 32440320

約数和(自身を除く): 12035229

約数列:

[1, 3, 7, 21, 43, 59, 129, 177, 301, 383, 413, 903, 1149, 1239, 2537, 2681, 7611, 8043, 16469, 17759, 22597, 49407, 53277, 67791, 115283, 158179, 345849, 474537, 971671, 2915013, 6801697, 20405091]

約数ペア:

[(1, 20405091), (3, 6801697), (7, 2915013), (21, 971671), (43, 474537), (59, 345849), (129, 158179), (177, 115283), (301, 67791), (383, 53277), (413, 49407), (903, 22597), (1149, 17759), (1239, 16469), (2537, 8043), (2681, 7611)]