400070920

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{44851}}^1$

素因数の和:45085

約数の個数: 32

約数和(自身を含む): 904216320

約数和(自身を除く): 504145400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 4460, 8920, 44851, 89702, 179404, 224255, 358808, 448510, 897020, 1794040, 10001773, 20003546, 40007092, 50008865, 80014184, 100017730, 200035460, 400070920]

約数ペア:

[(1, 400070920), (2, 200035460), (4, 100017730), (5, 80014184), (8, 50008865), (10, 40007092), (20, 20003546), (40, 10001773), (223, 1794040), (446, 897020), (892, 448510), (1115, 358808), (1784, 224255), (2230, 179404), (4460, 89702), (8920, 44851)]