20275780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{577}}^1$

素因数の和:844

約数の個数: 48

約数和(自身を含む): 48940416

約数和(自身を除く): 28664636

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 577, 1004, 1154, 1255, 1757, 2308, 2510, 2885, 3514, 4039, 5020, 5770, 7028, 8078, 8785, 11540, 16156, 17570, 20195, 35140, 40390, 80780, 144827, 289654, 579308, 724135, 1013789, 1448270, 2027578, 2896540, 4055156, 5068945, 10137890, 20275780]

約数ペア:

[(1, 20275780), (2, 10137890), (4, 5068945), (5, 4055156), (7, 2896540), (10, 2027578), (14, 1448270), (20, 1013789), (28, 724135), (35, 579308), (70, 289654), (140, 144827), (251, 80780), (502, 40390), (577, 35140), (1004, 20195), (1154, 17570), (1255, 16156), (1757, 11540), (2308, 8785), (2510, 8078), (2885, 7028), (3514, 5770), (4039, 5020)]