81698840

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{6653}}^1$

素因数の和:6971

約数の個数: 32

約数和(自身を含む): 184448880

約数和(自身を除く): 102750040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 2456, 3070, 6140, 6653, 12280, 13306, 26612, 33265, 53224, 66530, 133060, 266120, 2042471, 4084942, 8169884, 10212355, 16339768, 20424710, 40849420, 81698840]

約数ペア:

[(1, 81698840), (2, 40849420), (4, 20424710), (5, 16339768), (8, 10212355), (10, 8169884), (20, 4084942), (40, 2042471), (307, 266120), (614, 133060), (1228, 66530), (1535, 53224), (2456, 33265), (3070, 26612), (6140, 13306), (6653, 12280)]