21438020

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{3709}}^1$

素因数の和:3752

約数の個数: 36

約数和(自身を含む): 47836740

約数和(自身を除く): 26398720

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 289, 340, 578, 1156, 1445, 2890, 3709, 5780, 7418, 14836, 18545, 37090, 63053, 74180, 126106, 252212, 315265, 630530, 1071901, 1261060, 2143802, 4287604, 5359505, 10719010, 21438020]

約数ペア:

[(1, 21438020), (2, 10719010), (4, 5359505), (5, 4287604), (10, 2143802), (17, 1261060), (20, 1071901), (34, 630530), (68, 315265), (85, 252212), (170, 126106), (289, 74180), (340, 63053), (578, 37090), (1156, 18545), (1445, 14836), (2890, 7418), (3709, 5780)]