20742435

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{409}}^1$

素因数の和:457

約数の個数: 72

約数和(自身を含む): 43748640

約数和(自身を除く): 23006205

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 35, 45, 49, 63, 69, 105, 115, 147, 161, 207, 245, 315, 345, 409, 441, 483, 735, 805, 1035, 1127, 1227, 1449, 2045, 2205, 2415, 2863, 3381, 3681, 5635, 6135, 7245, 8589, 9407, 10143, 14315, 16905, 18405, 20041, 25767, 28221, 42945, 47035, 50715, 60123, 65849, 84663, 100205, 128835, 141105, 180369, 197547, 300615, 329245, 423315, 460943, 592641, 901845, 987735, 1382829, 2304715, 2963205, 4148487, 6914145, 20742435]

約数ペア:

[(1, 20742435), (3, 6914145), (5, 4148487), (7, 2963205), (9, 2304715), (15, 1382829), (21, 987735), (23, 901845), (35, 592641), (45, 460943), (49, 423315), (63, 329245), (69, 300615), (105, 197547), (115, 180369), (147, 141105), (161, 128835), (207, 100205), (245, 84663), (315, 65849), (345, 60123), (409, 50715), (441, 47035), (483, 42945), (735, 28221), (805, 25767), (1035, 20041), (1127, 18405), (1227, 16905), (1449, 14315), (2045, 10143), (2205, 9407), (2415, 8589), (2863, 7245), (3381, 6135), (3681, 5635)]