76780820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 165110400

約数和(自身を除く): 88329580

約数列:

[1, 2, 4, 5, 10, 20, 71, 139, 142, 278, 284, 355, 389, 556, 695, 710, 778, 1390, 1420, 1556, 1945, 2780, 3890, 7780, 9869, 19738, 27619, 39476, 49345, 54071, 55238, 98690, 108142, 110476, 138095, 197380, 216284, 270355, 276190, 540710, 552380, 1081420, 3839041, 7678082, 15356164, 19195205, 38390410, 76780820]

約数ペア:

[(1, 76780820), (2, 38390410), (4, 19195205), (5, 15356164), (10, 7678082), (20, 3839041), (71, 1081420), (139, 552380), (142, 540710), (278, 276190), (284, 270355), (355, 216284), (389, 197380), (556, 138095), (695, 110476), (710, 108142), (778, 98690), (1390, 55238), (1420, 54071), (1556, 49345), (1945, 39476), (2780, 27619), (3890, 19738), (7780, 9869)]