19994720

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7351}}^1$

素因数の和:7383

約数の個数: 48

約数和(自身を含む): 50023008

約数和(自身を除く): 30028288

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7351, 14702, 29404, 36755, 58808, 73510, 117616, 124967, 147020, 235232, 249934, 294040, 499868, 588080, 624835, 999736, 1176160, 1249670, 1999472, 2499340, 3998944, 4998680, 9997360, 19994720]

約数ペア:

[(1, 19994720), (2, 9997360), (4, 4998680), (5, 3998944), (8, 2499340), (10, 1999472), (16, 1249670), (17, 1176160), (20, 999736), (32, 624835), (34, 588080), (40, 499868), (68, 294040), (80, 249934), (85, 235232), (136, 147020), (160, 124967), (170, 117616), (272, 73510), (340, 58808), (544, 36755), (680, 29404), (1360, 14702), (2720, 7351)]