28257520

素因数分解:

$2^4\times 5^1\times {\mathrm{421}}^1\times {\mathrm{839}}^1$

素因数の和:1273

約数の個数: 40

約数和(自身を含む): 65933280

約数和(自身を除く): 37675760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 421, 839, 842, 1678, 1684, 2105, 3356, 3368, 4195, 4210, 6712, 6736, 8390, 8420, 13424, 16780, 16840, 33560, 33680, 67120, 353219, 706438, 1412876, 1766095, 2825752, 3532190, 5651504, 7064380, 14128760, 28257520]

約数ペア:

[(1, 28257520), (2, 14128760), (4, 7064380), (5, 5651504), (8, 3532190), (10, 2825752), (16, 1766095), (20, 1412876), (40, 706438), (80, 353219), (421, 67120), (839, 33680), (842, 33560), (1678, 16840), (1684, 16780), (2105, 13424), (3356, 8420), (3368, 8390), (4195, 6736), (4210, 6712)]