28242380

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19889}}^1$

素因数の和:19969

約数の個数: 24

約数和(自身を含む): 60147360

約数和(自身を除く): 31904980

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 19889, 39778, 79556, 99445, 198890, 397780, 1412119, 2824238, 5648476, 7060595, 14121190, 28242380]

約数ペア:

[(1, 28242380), (2, 14121190), (4, 7060595), (5, 5648476), (10, 2824238), (20, 1412119), (71, 397780), (142, 198890), (284, 99445), (355, 79556), (710, 39778), (1420, 19889)]