21608415

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{199}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 39936000

約数和(自身を除く): 18327585

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 127, 171, 199, 285, 381, 597, 635, 855, 995, 1143, 1791, 1905, 2413, 2985, 3781, 5715, 7239, 8955, 11343, 12065, 18905, 21717, 25273, 34029, 36195, 56715, 75819, 108585, 126365, 170145, 227457, 379095, 480187, 1137285, 1440561, 2400935, 4321683, 7202805, 21608415]

約数ペア:

[(1, 21608415), (3, 7202805), (5, 4321683), (9, 2400935), (15, 1440561), (19, 1137285), (45, 480187), (57, 379095), (95, 227457), (127, 170145), (171, 126365), (199, 108585), (285, 75819), (381, 56715), (597, 36195), (635, 34029), (855, 25273), (995, 21717), (1143, 18905), (1791, 12065), (1905, 11343), (2413, 8955), (2985, 7239), (3781, 5715)]