20578280

素因数分解:

$2^3\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3407}}^1$

素因数の和:3569

約数の個数: 32

約数和(自身を含む): 46621440

約数和(自身を除く): 26043160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 151, 302, 604, 755, 1208, 1510, 3020, 3407, 6040, 6814, 13628, 17035, 27256, 34070, 68140, 136280, 514457, 1028914, 2057828, 2572285, 4115656, 5144570, 10289140, 20578280]

約数ペア:

[(1, 20578280), (2, 10289140), (4, 5144570), (5, 4115656), (8, 2572285), (10, 2057828), (20, 1028914), (40, 514457), (151, 136280), (302, 68140), (604, 34070), (755, 27256), (1208, 17035), (1510, 13628), (3020, 6814), (3407, 6040)]