80721040

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9257}}^1$

素因数の和:9379

約数の個数: 40

約数和(自身を含む): 189418680

約数和(自身を除く): 108697640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 4360, 8720, 9257, 18514, 37028, 46285, 74056, 92570, 148112, 185140, 370280, 740560, 1009013, 2018026, 4036052, 5045065, 8072104, 10090130, 16144208, 20180260, 40360520, 80721040]

約数ペア:

[(1, 80721040), (2, 40360520), (4, 20180260), (5, 16144208), (8, 10090130), (10, 8072104), (16, 5045065), (20, 4036052), (40, 2018026), (80, 1009013), (109, 740560), (218, 370280), (436, 185140), (545, 148112), (872, 92570), (1090, 74056), (1744, 46285), (2180, 37028), (4360, 18514), (8720, 9257)]