21252465

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2137}}^1$

素因数の和:2178

約数の個数: 48

約数和(自身を含む): 42024528

約数和(自身を除く): 20772063

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 2137, 3315, 6411, 9945, 10685, 19233, 27781, 32055, 36329, 83343, 96165, 108987, 138905, 181645, 250029, 326961, 416715, 472277, 544935, 1250145, 1416831, 1634805, 2361385, 4250493, 7084155, 21252465]

約数ペア:

[(1, 21252465), (3, 7084155), (5, 4250493), (9, 2361385), (13, 1634805), (15, 1416831), (17, 1250145), (39, 544935), (45, 472277), (51, 416715), (65, 326961), (85, 250029), (117, 181645), (153, 138905), (195, 108987), (221, 96165), (255, 83343), (585, 36329), (663, 32055), (765, 27781), (1105, 19233), (1989, 10685), (2137, 9945), (3315, 6411)]