128125840

素因数分解:

$2^4\times 5^1\times {\mathrm{1601573}}^1$

素因数の和:1601586

約数の個数: 20

約数和(自身を含む): 297892764

約数和(自身を除く): 169766924

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1601573, 3203146, 6406292, 8007865, 12812584, 16015730, 25625168, 32031460, 64062920, 128125840]

約数ペア:

[(1, 128125840), (2, 64062920), (4, 32031460), (5, 25625168), (8, 16015730), (10, 12812584), (16, 8007865), (20, 6406292), (40, 3203146), (80, 1601573)]