821489725

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{439}}^1$

素因数の和:527

約数の個数: 72

約数和(自身を含む): 1272993920

約数和(自身を除く): 451504195

約数列:

[1, 5, 7, 17, 25, 35, 37, 85, 119, 175, 185, 259, 289, 425, 439, 595, 629, 925, 1295, 1445, 2023, 2195, 2975, 3073, 3145, 4403, 6475, 7225, 7463, 10115, 10693, 10975, 15365, 15725, 16243, 22015, 37315, 50575, 52241, 53465, 74851, 76825, 81215, 110075, 113701, 126871, 186575, 261205, 267325, 276131, 374255, 406075, 568505, 634355, 888097, 1306025, 1380655, 1871275, 1932917, 2842525, 3171775, 4440485, 4694227, 6903275, 9664585, 22202425, 23471135, 32859589, 48322925, 117355675, 164297945, 821489725]

約数ペア:

[(1, 821489725), (5, 164297945), (7, 117355675), (17, 48322925), (25, 32859589), (35, 23471135), (37, 22202425), (85, 9664585), (119, 6903275), (175, 4694227), (185, 4440485), (259, 3171775), (289, 2842525), (425, 1932917), (439, 1871275), (595, 1380655), (629, 1306025), (925, 888097), (1295, 634355), (1445, 568505), (2023, 406075), (2195, 374255), (2975, 276131), (3073, 267325), (3145, 261205), (4403, 186575), (6475, 126871), (7225, 113701), (7463, 110075), (10115, 81215), (10693, 76825), (10975, 74851), (15365, 53465), (15725, 52241), (16243, 50575), (22015, 37315)]