21250425

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2381}}^1$

素因数の和:2418

約数の個数: 48

約数和(自身を含む): 42532992

約数和(自身を除く): 21282567

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 51, 75, 85, 105, 119, 175, 255, 357, 425, 525, 595, 1275, 1785, 2381, 2975, 7143, 8925, 11905, 16667, 35715, 40477, 50001, 59525, 83335, 121431, 178575, 202385, 250005, 283339, 416675, 607155, 850017, 1011925, 1250025, 1416695, 3035775, 4250085, 7083475, 21250425]

約数ペア:

[(1, 21250425), (3, 7083475), (5, 4250085), (7, 3035775), (15, 1416695), (17, 1250025), (21, 1011925), (25, 850017), (35, 607155), (51, 416675), (75, 283339), (85, 250005), (105, 202385), (119, 178575), (175, 121431), (255, 83335), (357, 59525), (425, 50001), (525, 40477), (595, 35715), (1275, 16667), (1785, 11905), (2381, 8925), (2975, 7143)]