85721960

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{19661}}^1$

素因数の和:19781

約数の個数: 32

約数和(自身を含む): 194653800

約数和(自身を除く): 108931840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 19661, 39322, 78644, 98305, 157288, 196610, 393220, 786440, 2143049, 4286098, 8572196, 10715245, 17144392, 21430490, 42860980, 85721960]

約数ペア:

[(1, 85721960), (2, 42860980), (4, 21430490), (5, 17144392), (8, 10715245), (10, 8572196), (20, 4286098), (40, 2143049), (109, 786440), (218, 393220), (436, 196610), (545, 157288), (872, 98305), (1090, 78644), (2180, 39322), (4360, 19661)]