788335720

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{1997}}^1$

素因数の和:2218

約数の個数: 64

約数和(自身を含む): 1812585600

約数和(自身を除く): 1024249880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 139, 142, 278, 284, 355, 556, 568, 695, 710, 1112, 1390, 1420, 1997, 2780, 2840, 3994, 5560, 7988, 9869, 9985, 15976, 19738, 19970, 39476, 39940, 49345, 78952, 79880, 98690, 141787, 197380, 277583, 283574, 394760, 555166, 567148, 708935, 1110332, 1134296, 1387915, 1417870, 2220664, 2775830, 2835740, 5551660, 5671480, 11103320, 19708393, 39416786, 78833572, 98541965, 157667144, 197083930, 394167860, 788335720]

約数ペア:

[(1, 788335720), (2, 394167860), (4, 197083930), (5, 157667144), (8, 98541965), (10, 78833572), (20, 39416786), (40, 19708393), (71, 11103320), (139, 5671480), (142, 5551660), (278, 2835740), (284, 2775830), (355, 2220664), (556, 1417870), (568, 1387915), (695, 1134296), (710, 1110332), (1112, 708935), (1390, 567148), (1420, 555166), (1997, 394760), (2780, 283574), (2840, 277583), (3994, 197380), (5560, 141787), (7988, 98690), (9869, 79880), (9985, 78952), (15976, 49345), (19738, 39940), (19970, 39476)]