80777720

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:408

約数の個数: 64

約数和(自身を含む): 186278400

約数和(自身を除く): 105500680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 109, 191, 194, 218, 382, 388, 436, 485, 545, 764, 776, 872, 955, 970, 1090, 1528, 1910, 1940, 2180, 3820, 3880, 4360, 7640, 10573, 18527, 20819, 21146, 37054, 41638, 42292, 52865, 74108, 83276, 84584, 92635, 104095, 105730, 148216, 166552, 185270, 208190, 211460, 370540, 416380, 422920, 741080, 832760, 2019443, 4038886, 8077772, 10097215, 16155544, 20194430, 40388860, 80777720]

約数ペア:

[(1, 80777720), (2, 40388860), (4, 20194430), (5, 16155544), (8, 10097215), (10, 8077772), (20, 4038886), (40, 2019443), (97, 832760), (109, 741080), (191, 422920), (194, 416380), (218, 370540), (382, 211460), (388, 208190), (436, 185270), (485, 166552), (545, 148216), (764, 105730), (776, 104095), (872, 92635), (955, 84584), (970, 83276), (1090, 74108), (1528, 52865), (1910, 42292), (1940, 41638), (2180, 37054), (3820, 21146), (3880, 20819), (4360, 18527), (7640, 10573)]