81238900

素因数分解:

$2^2\times 5^2\times {\mathrm{223}}^1\times {\mathrm{3643}}^1$

素因数の和:3880

約数の個数: 36

約数和(自身を含む): 177127552

約数和(自身を除く): 95888652

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 223, 446, 892, 1115, 2230, 3643, 4460, 5575, 7286, 11150, 14572, 18215, 22300, 36430, 72860, 91075, 182150, 364300, 812389, 1624778, 3249556, 4061945, 8123890, 16247780, 20309725, 40619450, 81238900]

約数ペア:

[(1, 81238900), (2, 40619450), (4, 20309725), (5, 16247780), (10, 8123890), (20, 4061945), (25, 3249556), (50, 1624778), (100, 812389), (223, 364300), (446, 182150), (892, 91075), (1115, 72860), (2230, 36430), (3643, 22300), (4460, 18215), (5575, 14572), (7286, 11150)]