21009280

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1931}}^1$

素因数の和:1967

約数の個数: 64

約数和(自身を含む): 53207280

約数和(自身を除く): 32198000

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1931, 2176, 2720, 3862, 5440, 7724, 9655, 10880, 15448, 19310, 30896, 32827, 38620, 61792, 65654, 77240, 123584, 131308, 154480, 164135, 247168, 262616, 308960, 328270, 525232, 617920, 656540, 1050464, 1235840, 1313080, 2100928, 2626160, 4201856, 5252320, 10504640, 21009280]

約数ペア:

[(1, 21009280), (2, 10504640), (4, 5252320), (5, 4201856), (8, 2626160), (10, 2100928), (16, 1313080), (17, 1235840), (20, 1050464), (32, 656540), (34, 617920), (40, 525232), (64, 328270), (68, 308960), (80, 262616), (85, 247168), (128, 164135), (136, 154480), (160, 131308), (170, 123584), (272, 77240), (320, 65654), (340, 61792), (544, 38620), (640, 32827), (680, 30896), (1088, 19310), (1360, 15448), (1931, 10880), (2176, 9655), (2720, 7724), (3862, 5440)]