12128920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{3407}}^1$

素因数の和:3507

約数の個数: 32

約数和(自身を含む): 27604800

約数和(自身を除く): 15475880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3407, 3560, 6814, 13628, 17035, 27256, 34070, 68140, 136280, 303223, 606446, 1212892, 1516115, 2425784, 3032230, 6064460, 12128920]

約数ペア:

[(1, 12128920), (2, 6064460), (4, 3032230), (5, 2425784), (8, 1516115), (10, 1212892), (20, 606446), (40, 303223), (89, 136280), (178, 68140), (356, 34070), (445, 27256), (712, 17035), (890, 13628), (1780, 6814), (3407, 3560)]