81546640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{653}}^1$

素因数の和:896

約数の個数: 80

約数和(自身を含む): 217986048

約数和(自身を除く): 136439408

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 223, 280, 446, 560, 653, 892, 1115, 1306, 1561, 1784, 2230, 2612, 3122, 3265, 3568, 4460, 4571, 5224, 6244, 6530, 7805, 8920, 9142, 10448, 12488, 13060, 15610, 17840, 18284, 22855, 24976, 26120, 31220, 36568, 45710, 52240, 62440, 73136, 91420, 124880, 145619, 182840, 291238, 365680, 582476, 728095, 1019333, 1164952, 1456190, 2038666, 2329904, 2912380, 4077332, 5096665, 5824760, 8154664, 10193330, 11649520, 16309328, 20386660, 40773320, 81546640]

約数ペア:

[(1, 81546640), (2, 40773320), (4, 20386660), (5, 16309328), (7, 11649520), (8, 10193330), (10, 8154664), (14, 5824760), (16, 5096665), (20, 4077332), (28, 2912380), (35, 2329904), (40, 2038666), (56, 1456190), (70, 1164952), (80, 1019333), (112, 728095), (140, 582476), (223, 365680), (280, 291238), (446, 182840), (560, 145619), (653, 124880), (892, 91420), (1115, 73136), (1306, 62440), (1561, 52240), (1784, 45710), (2230, 36568), (2612, 31220), (3122, 26120), (3265, 24976), (3568, 22855), (4460, 18284), (4571, 17840), (5224, 15610), (6244, 13060), (6530, 12488), (7805, 10448), (8920, 9142)]