28148920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{7907}}^1$

素因数の和:8007

約数の個数: 32

約数和(自身を含む): 64054800

約数和(自身を除く): 35905880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 7907, 15814, 31628, 39535, 63256, 79070, 158140, 316280, 703723, 1407446, 2814892, 3518615, 5629784, 7037230, 14074460, 28148920]

約数ペア:

[(1, 28148920), (2, 14074460), (4, 7037230), (5, 5629784), (8, 3518615), (10, 2814892), (20, 1407446), (40, 703723), (89, 316280), (178, 158140), (356, 79070), (445, 63256), (712, 39535), (890, 31628), (1780, 15814), (3560, 7907)]