21784887

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 35942400

約数和(自身を除く): 14157513

約数列:

[1, 3, 9, 19, 23, 29, 57, 69, 87, 171, 191, 207, 261, 437, 551, 573, 667, 1311, 1653, 1719, 2001, 3629, 3933, 4393, 4959, 5539, 6003, 10887, 12673, 13179, 16617, 32661, 38019, 39537, 49851, 83467, 105241, 114057, 127397, 250401, 315723, 382191, 751203, 947169, 1146573, 2420543, 7261629, 21784887]

約数ペア:

[(1, 21784887), (3, 7261629), (9, 2420543), (19, 1146573), (23, 947169), (29, 751203), (57, 382191), (69, 315723), (87, 250401), (171, 127397), (191, 114057), (207, 105241), (261, 83467), (437, 49851), (551, 39537), (573, 38019), (667, 32661), (1311, 16617), (1653, 13179), (1719, 12673), (2001, 10887), (3629, 6003), (3933, 5539), (4393, 4959)]