21696165

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{359}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 40435200

約数和(自身を除く): 18739035

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 79, 85, 153, 237, 255, 359, 395, 711, 765, 1077, 1185, 1343, 1795, 3231, 3555, 4029, 5385, 6103, 6715, 12087, 16155, 18309, 20145, 28361, 30515, 54927, 60435, 85083, 91545, 141805, 255249, 274635, 425415, 482137, 1276245, 1446411, 2410685, 4339233, 7232055, 21696165]

約数ペア:

[(1, 21696165), (3, 7232055), (5, 4339233), (9, 2410685), (15, 1446411), (17, 1276245), (45, 482137), (51, 425415), (79, 274635), (85, 255249), (153, 141805), (237, 91545), (255, 85083), (359, 60435), (395, 54927), (711, 30515), (765, 28361), (1077, 20145), (1185, 18309), (1343, 16155), (1795, 12087), (3231, 6715), (3555, 6103), (4029, 5385)]