21895000

素因数分解:

$2^3\times 5^4\times {\mathrm{29}}^1\times {\mathrm{151}}^1$

素因数の和:206

約数の個数: 80

約数和(自身を含む): 53420400

約数和(自身を除く): 31525400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 29, 40, 50, 58, 100, 116, 125, 145, 151, 200, 232, 250, 290, 302, 500, 580, 604, 625, 725, 755, 1000, 1160, 1208, 1250, 1450, 1510, 2500, 2900, 3020, 3625, 3775, 4379, 5000, 5800, 6040, 7250, 7550, 8758, 14500, 15100, 17516, 18125, 18875, 21895, 29000, 30200, 35032, 36250, 37750, 43790, 72500, 75500, 87580, 94375, 109475, 145000, 151000, 175160, 188750, 218950, 377500, 437900, 547375, 755000, 875800, 1094750, 2189500, 2736875, 4379000, 5473750, 10947500, 21895000]

約数ペア:

[(1, 21895000), (2, 10947500), (4, 5473750), (5, 4379000), (8, 2736875), (10, 2189500), (20, 1094750), (25, 875800), (29, 755000), (40, 547375), (50, 437900), (58, 377500), (100, 218950), (116, 188750), (125, 175160), (145, 151000), (151, 145000), (200, 109475), (232, 94375), (250, 87580), (290, 75500), (302, 72500), (500, 43790), (580, 37750), (604, 36250), (625, 35032), (725, 30200), (755, 29000), (1000, 21895), (1160, 18875), (1208, 18125), (1250, 17516), (1450, 15100), (1510, 14500), (2500, 8758), (2900, 7550), (3020, 7250), (3625, 6040), (3775, 5800), (4379, 5000)]