20997440

素因数分解:

$2^6\times 5^1\times {\mathrm{65617}}^1$

素因数の和:65634

約数の個数: 28

約数和(自身を含む): 50000916

約数和(自身を除く): 29003476

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 65617, 131234, 262468, 328085, 524936, 656170, 1049872, 1312340, 2099744, 2624680, 4199488, 5249360, 10498720, 20997440]

約数ペア:

[(1, 20997440), (2, 10498720), (4, 5249360), (5, 4199488), (8, 2624680), (10, 2099744), (16, 1312340), (20, 1049872), (32, 656170), (40, 524936), (64, 328085), (80, 262468), (160, 131234), (320, 65617)]