21000750155

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{137399}}^1$

素因数の和:137819

約数の個数: 32

約数和(自身を含む): 31498675200

約数和(自身を除く): 10497925045

約数列:

[1, 5, 7, 11, 35, 55, 77, 385, 397, 1985, 2779, 4367, 13895, 21835, 30569, 137399, 152845, 686995, 961793, 1511389, 4808965, 7556945, 10579723, 52898615, 54547403, 272737015, 381831821, 600021433, 1909159105, 3000107165, 4200150031, 21000750155]

約数ペア:

[(1, 21000750155), (5, 4200150031), (7, 3000107165), (11, 1909159105), (35, 600021433), (55, 381831821), (77, 272737015), (385, 54547403), (397, 52898615), (1985, 10579723), (2779, 7556945), (4367, 4808965), (13895, 1511389), (21835, 961793), (30569, 686995), (137399, 152845)]