21512900

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{5003}}^1$

素因数の和:5060

約数の個数: 36

約数和(自身を含む): 47778192

約数和(自身を除く): 26265292

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 172, 215, 430, 860, 1075, 2150, 4300, 5003, 10006, 20012, 25015, 50030, 100060, 125075, 215129, 250150, 430258, 500300, 860516, 1075645, 2151290, 4302580, 5378225, 10756450, 21512900]

約数ペア:

[(1, 21512900), (2, 10756450), (4, 5378225), (5, 4302580), (10, 2151290), (20, 1075645), (25, 860516), (43, 500300), (50, 430258), (86, 250150), (100, 215129), (172, 125075), (215, 100060), (430, 50030), (860, 25015), (1075, 20012), (2150, 10006), (4300, 5003)]