20885945

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{229}}^1$

素因数の和:317

約数の個数: 32

約数和(自身を含む): 28317600

約数和(自身を除く): 7431655

約数列:

[1, 5, 17, 29, 37, 85, 145, 185, 229, 493, 629, 1073, 1145, 2465, 3145, 3893, 5365, 6641, 8473, 18241, 19465, 33205, 42365, 91205, 112897, 144041, 245717, 564485, 720205, 1228585, 4177189, 20885945]

約数ペア:

[(1, 20885945), (5, 4177189), (17, 1228585), (29, 720205), (37, 564485), (85, 245717), (145, 144041), (185, 112897), (229, 91205), (493, 42365), (629, 33205), (1073, 19465), (1145, 18241), (2465, 8473), (3145, 6641), (3893, 5365)]