788391320

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{439}}^1$

素因数の和:625

約数の個数: 128

約数和(自身を含む): 1995840000

約数和(自身を除く): 1207448680

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 38, 40, 68, 76, 85, 95, 136, 139, 152, 170, 190, 278, 323, 340, 380, 439, 556, 646, 680, 695, 760, 878, 1112, 1292, 1390, 1615, 1756, 2195, 2363, 2584, 2641, 2780, 3230, 3512, 4390, 4726, 5282, 5560, 6460, 7463, 8341, 8780, 9452, 10564, 11815, 12920, 13205, 14926, 16682, 17560, 18904, 21128, 23630, 26410, 29852, 33364, 37315, 41705, 44897, 47260, 52820, 59704, 61021, 66728, 74630, 83410, 89794, 94520, 105640, 122042, 141797, 149260, 166820, 179588, 224485, 244084, 283594, 298520, 305105, 333640, 359176, 448970, 488168, 567188, 610210, 708985, 897940, 1037357, 1134376, 1159399, 1220420, 1417970, 1795880, 2074714, 2318798, 2440840, 2835940, 4149428, 4637596, 5186785, 5671880, 5796995, 8298856, 9275192, 10373570, 11593990, 19709783, 20747140, 23187980, 39419566, 41494280, 46375960, 78839132, 98548915, 157678264, 197097830, 394195660, 788391320]

約数ペア:

[(1, 788391320), (2, 394195660), (4, 197097830), (5, 157678264), (8, 98548915), (10, 78839132), (17, 46375960), (19, 41494280), (20, 39419566), (34, 23187980), (38, 20747140), (40, 19709783), (68, 11593990), (76, 10373570), (85, 9275192), (95, 8298856), (136, 5796995), (139, 5671880), (152, 5186785), (170, 4637596), (190, 4149428), (278, 2835940), (323, 2440840), (340, 2318798), (380, 2074714), (439, 1795880), (556, 1417970), (646, 1220420), (680, 1159399), (695, 1134376), (760, 1037357), (878, 897940), (1112, 708985), (1292, 610210), (1390, 567188), (1615, 488168), (1756, 448970), (2195, 359176), (2363, 333640), (2584, 305105), (2641, 298520), (2780, 283594), (3230, 244084), (3512, 224485), (4390, 179588), (4726, 166820), (5282, 149260), (5560, 141797), (6460, 122042), (7463, 105640), (8341, 94520), (8780, 89794), (9452, 83410), (10564, 74630), (11815, 66728), (12920, 61021), (13205, 59704), (14926, 52820), (16682, 47260), (17560, 44897), (18904, 41705), (21128, 37315), (23630, 33364), (26410, 29852)]