28707217

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:237

約数の個数: 32

約数和(自身を含む): 37324800

約数和(自身を除く): 8617583

約数列:

[1, 7, 11, 59, 71, 77, 89, 413, 497, 623, 649, 781, 979, 4189, 4543, 5251, 5467, 6319, 6853, 29323, 36757, 44233, 46079, 57761, 69509, 322553, 372821, 404327, 486563, 2609747, 4101031, 28707217]

約数ペア:

[(1, 28707217), (7, 4101031), (11, 2609747), (59, 486563), (71, 404327), (77, 372821), (89, 322553), (413, 69509), (497, 57761), (623, 46079), (649, 44233), (781, 36757), (979, 29323), (4189, 6853), (4543, 6319), (5251, 5467)]