21094040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{251}}^1$

素因数の和:464

約数の個数: 64

約数和(自身を含む): 52254720

約数和(自身を除く): 31160680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 191, 220, 251, 382, 440, 502, 764, 955, 1004, 1255, 1528, 1910, 2008, 2101, 2510, 2761, 3820, 4202, 5020, 5522, 7640, 8404, 10040, 10505, 11044, 13805, 16808, 21010, 22088, 27610, 42020, 47941, 55220, 84040, 95882, 110440, 191764, 239705, 383528, 479410, 527351, 958820, 1054702, 1917640, 2109404, 2636755, 4218808, 5273510, 10547020, 21094040]

約数ペア:

[(1, 21094040), (2, 10547020), (4, 5273510), (5, 4218808), (8, 2636755), (10, 2109404), (11, 1917640), (20, 1054702), (22, 958820), (40, 527351), (44, 479410), (55, 383528), (88, 239705), (110, 191764), (191, 110440), (220, 95882), (251, 84040), (382, 55220), (440, 47941), (502, 42020), (764, 27610), (955, 22088), (1004, 21010), (1255, 16808), (1528, 13805), (1910, 11044), (2008, 10505), (2101, 10040), (2510, 8404), (2761, 7640), (3820, 5522), (4202, 5020)]