21308840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76103}}^1$

素因数の和:76121

約数の個数: 32

約数和(自身を含む): 54794880

約数和(自身を除く): 33486040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76103, 152206, 304412, 380515, 532721, 608824, 761030, 1065442, 1522060, 2130884, 2663605, 3044120, 4261768, 5327210, 10654420, 21308840]

約数ペア:

[(1, 21308840), (2, 10654420), (4, 5327210), (5, 4261768), (7, 3044120), (8, 2663605), (10, 2130884), (14, 1522060), (20, 1065442), (28, 761030), (35, 608824), (40, 532721), (56, 380515), (70, 304412), (140, 152206), (280, 76103)]