20428240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{36479}}^1$

素因数の和:36499

約数の個数: 40

約数和(自身を含む): 54282240

約数和(自身を除く): 33854000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 36479, 72958, 145916, 182395, 255353, 291832, 364790, 510706, 583664, 729580, 1021412, 1276765, 1459160, 2042824, 2553530, 2918320, 4085648, 5107060, 10214120, 20428240]

約数ペア:

[(1, 20428240), (2, 10214120), (4, 5107060), (5, 4085648), (7, 2918320), (8, 2553530), (10, 2042824), (14, 1459160), (16, 1276765), (20, 1021412), (28, 729580), (35, 583664), (40, 510706), (56, 364790), (70, 291832), (80, 255353), (112, 182395), (140, 145916), (280, 72958), (560, 36479)]