20403250

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:244

約数の個数: 64

約数和(自身を含む): 44478720

約数和(自身を除く): 24075470

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 89, 125, 131, 175, 178, 250, 262, 350, 445, 623, 655, 875, 890, 917, 1246, 1310, 1750, 1834, 2225, 3115, 3275, 4450, 4585, 6230, 6550, 9170, 11125, 11659, 15575, 16375, 22250, 22925, 23318, 31150, 32750, 45850, 58295, 77875, 81613, 114625, 116590, 155750, 163226, 229250, 291475, 408065, 582950, 816130, 1457375, 2040325, 2914750, 4080650, 10201625, 20403250]

約数ペア:

[(1, 20403250), (2, 10201625), (5, 4080650), (7, 2914750), (10, 2040325), (14, 1457375), (25, 816130), (35, 582950), (50, 408065), (70, 291475), (89, 229250), (125, 163226), (131, 155750), (175, 116590), (178, 114625), (250, 81613), (262, 77875), (350, 58295), (445, 45850), (623, 32750), (655, 31150), (875, 23318), (890, 22925), (917, 22250), (1246, 16375), (1310, 15575), (1750, 11659), (1834, 11125), (2225, 9170), (3115, 6550), (3275, 6230), (4450, 4585)]