77767720

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:418

約数の個数: 64

約数和(自身を含む): 179625600

約数和(自身を除く): 101857880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 139, 142, 197, 278, 284, 355, 394, 556, 568, 695, 710, 788, 985, 1112, 1390, 1420, 1576, 1970, 2780, 2840, 3940, 5560, 7880, 9869, 13987, 19738, 27383, 27974, 39476, 49345, 54766, 55948, 69935, 78952, 98690, 109532, 111896, 136915, 139870, 197380, 219064, 273830, 279740, 394760, 547660, 559480, 1095320, 1944193, 3888386, 7776772, 9720965, 15553544, 19441930, 38883860, 77767720]

約数ペア:

[(1, 77767720), (2, 38883860), (4, 19441930), (5, 15553544), (8, 9720965), (10, 7776772), (20, 3888386), (40, 1944193), (71, 1095320), (139, 559480), (142, 547660), (197, 394760), (278, 279740), (284, 273830), (355, 219064), (394, 197380), (556, 139870), (568, 136915), (695, 111896), (710, 109532), (788, 98690), (985, 78952), (1112, 69935), (1390, 55948), (1420, 54766), (1576, 49345), (1970, 39476), (2780, 27974), (2840, 27383), (3940, 19738), (5560, 13987), (7880, 9869)]