78870520

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{661}}^1$

素因数の和:848

約数の個数: 64

約数和(自身を含む): 188272800

約数和(自身を除く): 109402280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 157, 190, 314, 380, 628, 661, 760, 785, 1256, 1322, 1570, 2644, 2983, 3140, 3305, 5288, 5966, 6280, 6610, 11932, 12559, 13220, 14915, 23864, 25118, 26440, 29830, 50236, 59660, 62795, 100472, 103777, 119320, 125590, 207554, 251180, 415108, 502360, 518885, 830216, 1037770, 1971763, 2075540, 3943526, 4151080, 7887052, 9858815, 15774104, 19717630, 39435260, 78870520]

約数ペア:

[(1, 78870520), (2, 39435260), (4, 19717630), (5, 15774104), (8, 9858815), (10, 7887052), (19, 4151080), (20, 3943526), (38, 2075540), (40, 1971763), (76, 1037770), (95, 830216), (152, 518885), (157, 502360), (190, 415108), (314, 251180), (380, 207554), (628, 125590), (661, 119320), (760, 103777), (785, 100472), (1256, 62795), (1322, 59660), (1570, 50236), (2644, 29830), (2983, 26440), (3140, 25118), (3305, 23864), (5288, 14915), (5966, 13220), (6280, 12559), (6610, 11932)]