18721703

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{317}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 25643520

約数和(自身を除く): 6921817

約数列:

[1, 7, 11, 13, 59, 77, 91, 143, 317, 413, 649, 767, 1001, 2219, 3487, 4121, 4543, 5369, 8437, 18703, 24409, 28847, 45331, 59059, 130921, 205733, 243139, 317317, 1440131, 1701973, 2674529, 18721703]

約数ペア:

[(1, 18721703), (7, 2674529), (11, 1701973), (13, 1440131), (59, 317317), (77, 243139), (91, 205733), (143, 130921), (317, 59059), (413, 45331), (649, 28847), (767, 24409), (1001, 18703), (2219, 8437), (3487, 5369), (4121, 4543)]