78407920

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{991}}^1$

素因数の和:1070

約数の個数: 80

約数和(自身を含む): 194844672

約数和(自身を除く): 116436752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 43, 46, 80, 86, 92, 115, 172, 184, 215, 230, 344, 368, 430, 460, 688, 860, 920, 989, 991, 1720, 1840, 1978, 1982, 3440, 3956, 3964, 4945, 4955, 7912, 7928, 9890, 9910, 15824, 15856, 19780, 19820, 22793, 39560, 39640, 42613, 45586, 79120, 79280, 85226, 91172, 113965, 170452, 182344, 213065, 227930, 340904, 364688, 426130, 455860, 681808, 852260, 911720, 980099, 1704520, 1823440, 1960198, 3409040, 3920396, 4900495, 7840792, 9800990, 15681584, 19601980, 39203960, 78407920]

約数ペア:

[(1, 78407920), (2, 39203960), (4, 19601980), (5, 15681584), (8, 9800990), (10, 7840792), (16, 4900495), (20, 3920396), (23, 3409040), (40, 1960198), (43, 1823440), (46, 1704520), (80, 980099), (86, 911720), (92, 852260), (115, 681808), (172, 455860), (184, 426130), (215, 364688), (230, 340904), (344, 227930), (368, 213065), (430, 182344), (460, 170452), (688, 113965), (860, 91172), (920, 85226), (989, 79280), (991, 79120), (1720, 45586), (1840, 42613), (1978, 39640), (1982, 39560), (3440, 22793), (3956, 19820), (3964, 19780), (4945, 15856), (4955, 15824), (7912, 9910), (7928, 9890)]