80387720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{287099}}^1$

素因数の和:287117

約数の個数: 32

約数和(自身を含む): 206712000

約数和(自身を除く): 126324280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 287099, 574198, 1148396, 1435495, 2009693, 2296792, 2870990, 4019386, 5741980, 8038772, 10048465, 11483960, 16077544, 20096930, 40193860, 80387720]

約数ペア:

[(1, 80387720), (2, 40193860), (4, 20096930), (5, 16077544), (7, 11483960), (8, 10048465), (10, 8038772), (14, 5741980), (20, 4019386), (28, 2870990), (35, 2296792), (40, 2009693), (56, 1435495), (70, 1148396), (140, 574198), (280, 287099)]