18678760

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:370

約数の個数: 64

約数和(自身を含む): 44582400

約数和(自身を除く): 25903640

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 79, 92, 115, 158, 184, 230, 257, 316, 395, 460, 514, 632, 790, 920, 1028, 1285, 1580, 1817, 2056, 2570, 3160, 3634, 5140, 5911, 7268, 9085, 10280, 11822, 14536, 18170, 20303, 23644, 29555, 36340, 40606, 47288, 59110, 72680, 81212, 101515, 118220, 162424, 203030, 236440, 406060, 466969, 812120, 933938, 1867876, 2334845, 3735752, 4669690, 9339380, 18678760]

約数ペア:

[(1, 18678760), (2, 9339380), (4, 4669690), (5, 3735752), (8, 2334845), (10, 1867876), (20, 933938), (23, 812120), (40, 466969), (46, 406060), (79, 236440), (92, 203030), (115, 162424), (158, 118220), (184, 101515), (230, 81212), (257, 72680), (316, 59110), (395, 47288), (460, 40606), (514, 36340), (632, 29555), (790, 23644), (920, 20303), (1028, 18170), (1285, 14536), (1580, 11822), (1817, 10280), (2056, 9085), (2570, 7268), (3160, 5911), (3634, 5140)]