18517340

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:302

約数の個数: 48

約数和(自身を含む): 40098240

約数和(自身を除く): 21580900

約数列:

[1, 2, 4, 5, 10, 20, 89, 101, 103, 178, 202, 206, 356, 404, 412, 445, 505, 515, 890, 1010, 1030, 1780, 2020, 2060, 8989, 9167, 10403, 17978, 18334, 20806, 35956, 36668, 41612, 44945, 45835, 52015, 89890, 91670, 104030, 179780, 183340, 208060, 925867, 1851734, 3703468, 4629335, 9258670, 18517340]

約数ペア:

[(1, 18517340), (2, 9258670), (4, 4629335), (5, 3703468), (10, 1851734), (20, 925867), (89, 208060), (101, 183340), (103, 179780), (178, 104030), (202, 91670), (206, 89890), (356, 52015), (404, 45835), (412, 44945), (445, 41612), (505, 36668), (515, 35956), (890, 20806), (1010, 18334), (1030, 17978), (1780, 10403), (2020, 9167), (2060, 8989)]