20117560

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5651}}^1$

素因数の和:5751

約数の個数: 32

約数和(自身を含む): 45781200

約数和(自身を除く): 25663640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5651, 11302, 22604, 28255, 45208, 56510, 113020, 226040, 502939, 1005878, 2011756, 2514695, 4023512, 5029390, 10058780, 20117560]

約数ペア:

[(1, 20117560), (2, 10058780), (4, 5029390), (5, 4023512), (8, 2514695), (10, 2011756), (20, 1005878), (40, 502939), (89, 226040), (178, 113020), (356, 56510), (445, 45208), (712, 28255), (890, 22604), (1780, 11302), (3560, 5651)]