21700385

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{3851}}^1$

素因数の和:3893

約数の個数: 24

約数和(自身を含む): 31617216

約数和(自身を除く): 9916831

約数列:

[1, 5, 7, 23, 35, 49, 115, 161, 245, 805, 1127, 3851, 5635, 19255, 26957, 88573, 134785, 188699, 442865, 620011, 943495, 3100055, 4340077, 21700385]

約数ペア:

[(1, 21700385), (5, 4340077), (7, 3100055), (23, 943495), (35, 620011), (49, 442865), (115, 188699), (161, 134785), (245, 88573), (805, 26957), (1127, 19255), (3851, 5635)]