78628240

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 188559360

約数和(自身を除く): 109931120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 109, 127, 142, 218, 254, 284, 355, 436, 508, 545, 568, 635, 710, 872, 1016, 1090, 1136, 1270, 1420, 1744, 2032, 2180, 2540, 2840, 4360, 5080, 5680, 7739, 8720, 9017, 10160, 13843, 15478, 18034, 27686, 30956, 36068, 38695, 45085, 55372, 61912, 69215, 72136, 77390, 90170, 110744, 123824, 138430, 144272, 154780, 180340, 221488, 276860, 309560, 360680, 553720, 619120, 721360, 982853, 1107440, 1965706, 3931412, 4914265, 7862824, 9828530, 15725648, 19657060, 39314120, 78628240]

約数ペア:

[(1, 78628240), (2, 39314120), (4, 19657060), (5, 15725648), (8, 9828530), (10, 7862824), (16, 4914265), (20, 3931412), (40, 1965706), (71, 1107440), (80, 982853), (109, 721360), (127, 619120), (142, 553720), (218, 360680), (254, 309560), (284, 276860), (355, 221488), (436, 180340), (508, 154780), (545, 144272), (568, 138430), (635, 123824), (710, 110744), (872, 90170), (1016, 77390), (1090, 72136), (1136, 69215), (1270, 61912), (1420, 55372), (1744, 45085), (2032, 38695), (2180, 36068), (2540, 30956), (2840, 27686), (4360, 18034), (5080, 15478), (5680, 13843), (7739, 10160), (8720, 9017)]