21131565

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{137}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 42287616

約数和(自身を除く): 21156051

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 113, 137, 195, 273, 339, 411, 455, 565, 685, 791, 959, 1365, 1469, 1695, 1781, 2055, 2373, 2877, 3955, 4407, 4795, 5343, 7345, 8905, 10283, 11865, 12467, 14385, 15481, 22035, 26715, 30849, 37401, 46443, 51415, 62335, 77405, 108367, 154245, 187005, 201253, 232215, 325101, 541835, 603759, 1006265, 1408771, 1625505, 3018795, 4226313, 7043855, 21131565]

約数ペア:

[(1, 21131565), (3, 7043855), (5, 4226313), (7, 3018795), (13, 1625505), (15, 1408771), (21, 1006265), (35, 603759), (39, 541835), (65, 325101), (91, 232215), (105, 201253), (113, 187005), (137, 154245), (195, 108367), (273, 77405), (339, 62335), (411, 51415), (455, 46443), (565, 37401), (685, 30849), (791, 26715), (959, 22035), (1365, 15481), (1469, 14385), (1695, 12467), (1781, 11865), (2055, 10283), (2373, 8905), (2877, 7345), (3955, 5343), (4407, 4795)]