21072135

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1987}}^1$

素因数の和:2103

約数の個数: 32

約数和(自身を含む): 38932992

約数和(自身を除く): 17860857

約数列:

[1, 3, 5, 7, 15, 21, 35, 101, 105, 303, 505, 707, 1515, 1987, 2121, 3535, 5961, 9935, 10605, 13909, 29805, 41727, 69545, 200687, 208635, 602061, 1003435, 1404809, 3010305, 4214427, 7024045, 21072135]

約数ペア:

[(1, 21072135), (3, 7024045), (5, 4214427), (7, 3010305), (15, 1404809), (21, 1003435), (35, 602061), (101, 208635), (105, 200687), (303, 69545), (505, 41727), (707, 29805), (1515, 13909), (1987, 10605), (2121, 9935), (3535, 5961)]