19688120

素因数分解:

$2^3\times 5^1\times {\mathrm{509}}^1\times {\mathrm{967}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 44431200

約数和(自身を除く): 24743080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 509, 967, 1018, 1934, 2036, 2545, 3868, 4072, 4835, 5090, 7736, 9670, 10180, 19340, 20360, 38680, 492203, 984406, 1968812, 2461015, 3937624, 4922030, 9844060, 19688120]

約数ペア:

[(1, 19688120), (2, 9844060), (4, 4922030), (5, 3937624), (8, 2461015), (10, 1968812), (20, 984406), (40, 492203), (509, 38680), (967, 20360), (1018, 19340), (1934, 10180), (2036, 9670), (2545, 7736), (3868, 5090), (4072, 4835)]