128513525

素因数分解:

$5^2\times 7^4\times {\mathrm{2141}}^1$

素因数の和:2179

約数の個数: 30

約数和(自身を含む): 185992002

約数和(自身を除く): 57478477

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 343, 1225, 1715, 2141, 2401, 8575, 10705, 12005, 14987, 53525, 60025, 74935, 104909, 374675, 524545, 734363, 2622725, 3671815, 5140541, 18359075, 25702705, 128513525]

約数ペア:

[(1, 128513525), (5, 25702705), (7, 18359075), (25, 5140541), (35, 3671815), (49, 2622725), (175, 734363), (245, 524545), (343, 374675), (1225, 104909), (1715, 74935), (2141, 60025), (2401, 53525), (8575, 14987), (10705, 12005)]