28720300

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{461}}^1$

素因数の和:571

約数の個数: 72

約数和(自身を含む): 72182880

約数和(自身を除く): 43462580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 89, 100, 140, 175, 178, 350, 356, 445, 461, 623, 700, 890, 922, 1246, 1780, 1844, 2225, 2305, 2492, 3115, 3227, 4450, 4610, 6230, 6454, 8900, 9220, 11525, 12460, 12908, 15575, 16135, 23050, 31150, 32270, 41029, 46100, 62300, 64540, 80675, 82058, 161350, 164116, 205145, 287203, 322700, 410290, 574406, 820580, 1025725, 1148812, 1436015, 2051450, 2872030, 4102900, 5744060, 7180075, 14360150, 28720300]

約数ペア:

[(1, 28720300), (2, 14360150), (4, 7180075), (5, 5744060), (7, 4102900), (10, 2872030), (14, 2051450), (20, 1436015), (25, 1148812), (28, 1025725), (35, 820580), (50, 574406), (70, 410290), (89, 322700), (100, 287203), (140, 205145), (175, 164116), (178, 161350), (350, 82058), (356, 80675), (445, 64540), (461, 62300), (623, 46100), (700, 41029), (890, 32270), (922, 31150), (1246, 23050), (1780, 16135), (1844, 15575), (2225, 12908), (2305, 12460), (2492, 11525), (3115, 9220), (3227, 8900), (4450, 6454), (4610, 6230)]