77801080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1999}}^1$

素因数の和:2156

約数の個数: 64

約数和(自身を含む): 201600000

約数和(自身を除く): 123798920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 556, 695, 973, 1112, 1390, 1946, 1999, 2780, 3892, 3998, 4865, 5560, 7784, 7996, 9730, 9995, 13993, 15992, 19460, 19990, 27986, 38920, 39980, 55972, 69965, 79960, 111944, 139930, 277861, 279860, 555722, 559720, 1111444, 1389305, 1945027, 2222888, 2778610, 3890054, 5557220, 7780108, 9725135, 11114440, 15560216, 19450270, 38900540, 77801080]

約数ペア:

[(1, 77801080), (2, 38900540), (4, 19450270), (5, 15560216), (7, 11114440), (8, 9725135), (10, 7780108), (14, 5557220), (20, 3890054), (28, 2778610), (35, 2222888), (40, 1945027), (56, 1389305), (70, 1111444), (139, 559720), (140, 555722), (278, 279860), (280, 277861), (556, 139930), (695, 111944), (973, 79960), (1112, 69965), (1390, 55972), (1946, 39980), (1999, 38920), (2780, 27986), (3892, 19990), (3998, 19460), (4865, 15992), (5560, 13993), (7784, 9995), (7996, 9730)]