21174040

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12911}}^1$

素因数の和:12963

約数の個数: 32

約数和(自身を含む): 48807360

約数和(自身を除く): 27633320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12911, 25822, 51644, 64555, 103288, 129110, 258220, 516440, 529351, 1058702, 2117404, 2646755, 4234808, 5293510, 10587020, 21174040]

約数ペア:

[(1, 21174040), (2, 10587020), (4, 5293510), (5, 4234808), (8, 2646755), (10, 2117404), (20, 1058702), (40, 529351), (41, 516440), (82, 258220), (164, 129110), (205, 103288), (328, 64555), (410, 51644), (820, 25822), (1640, 12911)]