81757520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{619}}^1$

素因数の和:772

約数の個数: 80

約数和(自身を含む): 206653440

約数和(自身を除く): 124895920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 127, 130, 208, 254, 260, 508, 520, 619, 635, 1016, 1040, 1238, 1270, 1651, 2032, 2476, 2540, 3095, 3302, 4952, 5080, 6190, 6604, 8047, 8255, 9904, 10160, 12380, 13208, 16094, 16510, 24760, 26416, 32188, 33020, 40235, 49520, 64376, 66040, 78613, 80470, 128752, 132080, 157226, 160940, 314452, 321880, 393065, 628904, 643760, 786130, 1021969, 1257808, 1572260, 2043938, 3144520, 4087876, 5109845, 6289040, 8175752, 10219690, 16351504, 20439380, 40878760, 81757520]

約数ペア:

[(1, 81757520), (2, 40878760), (4, 20439380), (5, 16351504), (8, 10219690), (10, 8175752), (13, 6289040), (16, 5109845), (20, 4087876), (26, 3144520), (40, 2043938), (52, 1572260), (65, 1257808), (80, 1021969), (104, 786130), (127, 643760), (130, 628904), (208, 393065), (254, 321880), (260, 314452), (508, 160940), (520, 157226), (619, 132080), (635, 128752), (1016, 80470), (1040, 78613), (1238, 66040), (1270, 64376), (1651, 49520), (2032, 40235), (2476, 33020), (2540, 32188), (3095, 26416), (3302, 24760), (4952, 16510), (5080, 16094), (6190, 13208), (6604, 12380), (8047, 10160), (8255, 9904)]