21004310

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{227}}^1\times {\mathrm{487}}^1$

素因数の和:740

約数の個数: 32

約数和(自身を含む): 40055040

約数和(自身を除く): 19050730

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 227, 454, 487, 974, 1135, 2270, 2435, 4313, 4870, 8626, 9253, 18506, 21565, 43130, 46265, 92530, 110549, 221098, 552745, 1105490, 2100431, 4200862, 10502155, 21004310]

約数ペア:

[(1, 21004310), (2, 10502155), (5, 4200862), (10, 2100431), (19, 1105490), (38, 552745), (95, 221098), (190, 110549), (227, 92530), (454, 46265), (487, 43130), (974, 21565), (1135, 18506), (2270, 9253), (2435, 8626), (4313, 4870)]