20425125

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{31}}^1\times {\mathrm{251}}^1$

素因数の和:307

約数の個数: 64

約数和(自身を含む): 40255488

約数和(自身を除く): 19830363

約数列:

[1, 3, 5, 7, 15, 21, 25, 31, 35, 75, 93, 105, 125, 155, 175, 217, 251, 375, 465, 525, 651, 753, 775, 875, 1085, 1255, 1757, 2325, 2625, 3255, 3765, 3875, 5271, 5425, 6275, 7781, 8785, 11625, 16275, 18825, 23343, 26355, 27125, 31375, 38905, 43925, 54467, 81375, 94125, 116715, 131775, 163401, 194525, 219625, 272335, 583575, 658875, 817005, 972625, 1361675, 2917875, 4085025, 6808375, 20425125]

約数ペア:

[(1, 20425125), (3, 6808375), (5, 4085025), (7, 2917875), (15, 1361675), (21, 972625), (25, 817005), (31, 658875), (35, 583575), (75, 272335), (93, 219625), (105, 194525), (125, 163401), (155, 131775), (175, 116715), (217, 94125), (251, 81375), (375, 54467), (465, 43925), (525, 38905), (651, 31375), (753, 27125), (775, 26355), (875, 23343), (1085, 18825), (1255, 16275), (1757, 11625), (2325, 8785), (2625, 7781), (3255, 6275), (3765, 5425), (3875, 5271)]