20745725

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{829}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 34581120

約数和(自身を除く): 13835395

約数列:

[1, 5, 7, 11, 13, 25, 35, 55, 65, 77, 91, 143, 175, 275, 325, 385, 455, 715, 829, 1001, 1925, 2275, 3575, 4145, 5005, 5803, 9119, 10777, 20725, 25025, 29015, 45595, 53885, 63833, 75439, 118547, 145075, 227975, 269425, 319165, 377195, 592735, 829829, 1595825, 1885975, 2963675, 4149145, 20745725]

約数ペア:

[(1, 20745725), (5, 4149145), (7, 2963675), (11, 1885975), (13, 1595825), (25, 829829), (35, 592735), (55, 377195), (65, 319165), (77, 269425), (91, 227975), (143, 145075), (175, 118547), (275, 75439), (325, 63833), (385, 53885), (455, 45595), (715, 29015), (829, 25025), (1001, 20725), (1925, 10777), (2275, 9119), (3575, 5803), (4145, 5005)]