78123440

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{499}}^1$

素因数の和:634

約数の個数: 80

約数和(自身を含む): 193440000

約数和(自身を除く): 115316560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 103, 152, 190, 206, 304, 380, 412, 499, 515, 760, 824, 998, 1030, 1520, 1648, 1957, 1996, 2060, 2495, 3914, 3992, 4120, 4990, 7828, 7984, 8240, 9481, 9785, 9980, 15656, 18962, 19570, 19960, 31312, 37924, 39140, 39920, 47405, 51397, 75848, 78280, 94810, 102794, 151696, 156560, 189620, 205588, 256985, 379240, 411176, 513970, 758480, 822352, 976543, 1027940, 1953086, 2055880, 3906172, 4111760, 4882715, 7812344, 9765430, 15624688, 19530860, 39061720, 78123440]

約数ペア:

[(1, 78123440), (2, 39061720), (4, 19530860), (5, 15624688), (8, 9765430), (10, 7812344), (16, 4882715), (19, 4111760), (20, 3906172), (38, 2055880), (40, 1953086), (76, 1027940), (80, 976543), (95, 822352), (103, 758480), (152, 513970), (190, 411176), (206, 379240), (304, 256985), (380, 205588), (412, 189620), (499, 156560), (515, 151696), (760, 102794), (824, 94810), (998, 78280), (1030, 75848), (1520, 51397), (1648, 47405), (1957, 39920), (1996, 39140), (2060, 37924), (2495, 31312), (3914, 19960), (3992, 19570), (4120, 18962), (4990, 15656), (7828, 9980), (7984, 9785), (8240, 9481)]