20887475

素因数分解:

$5^2\times 7^2\times {\mathrm{17}}^2\times {\mathrm{59}}^1$

素因数の和:117

約数の個数: 54

約数和(自身を含む): 32548140

約数和(自身を除く): 11660665

約数列:

[1, 5, 7, 17, 25, 35, 49, 59, 85, 119, 175, 245, 289, 295, 413, 425, 595, 833, 1003, 1225, 1445, 1475, 2023, 2065, 2891, 2975, 4165, 5015, 7021, 7225, 10115, 10325, 14161, 14455, 17051, 20825, 25075, 35105, 49147, 50575, 70805, 72275, 85255, 119357, 175525, 245735, 354025, 426275, 596785, 835499, 1228675, 2983925, 4177495, 20887475]

約数ペア:

[(1, 20887475), (5, 4177495), (7, 2983925), (17, 1228675), (25, 835499), (35, 596785), (49, 426275), (59, 354025), (85, 245735), (119, 175525), (175, 119357), (245, 85255), (289, 72275), (295, 70805), (413, 50575), (425, 49147), (595, 35105), (833, 25075), (1003, 20825), (1225, 17051), (1445, 14455), (1475, 14161), (2023, 10325), (2065, 10115), (2891, 7225), (2975, 7021), (4165, 5015)]