21131253

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{421}}^1$

素因数の和:467

約数の個数: 48

約数和(自身を含む): 37068480

約数和(自身を除く): 15937227

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 99, 117, 143, 169, 297, 351, 421, 429, 507, 1263, 1287, 1521, 1859, 3789, 3861, 4563, 4631, 5473, 5577, 11367, 13893, 16419, 16731, 41679, 49257, 50193, 60203, 71149, 125037, 147771, 180609, 213447, 541827, 640341, 782639, 1625481, 1921023, 2347917, 7043751, 21131253]

約数ペア:

[(1, 21131253), (3, 7043751), (9, 2347917), (11, 1921023), (13, 1625481), (27, 782639), (33, 640341), (39, 541827), (99, 213447), (117, 180609), (143, 147771), (169, 125037), (297, 71149), (351, 60203), (421, 50193), (429, 49257), (507, 41679), (1263, 16731), (1287, 16419), (1521, 13893), (1859, 11367), (3789, 5577), (3861, 5473), (4563, 4631)]