28574920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{643}}^1$

素因数の和:766

約数の個数: 64

約数和(自身を含む): 70943040

約数和(自身を除く): 42368120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 101, 110, 202, 220, 404, 440, 505, 643, 808, 1010, 1111, 1286, 2020, 2222, 2572, 3215, 4040, 4444, 5144, 5555, 6430, 7073, 8888, 11110, 12860, 14146, 22220, 25720, 28292, 35365, 44440, 56584, 64943, 70730, 129886, 141460, 259772, 282920, 324715, 519544, 649430, 714373, 1298860, 1428746, 2597720, 2857492, 3571865, 5714984, 7143730, 14287460, 28574920]

約数ペア:

[(1, 28574920), (2, 14287460), (4, 7143730), (5, 5714984), (8, 3571865), (10, 2857492), (11, 2597720), (20, 1428746), (22, 1298860), (40, 714373), (44, 649430), (55, 519544), (88, 324715), (101, 282920), (110, 259772), (202, 141460), (220, 129886), (404, 70730), (440, 64943), (505, 56584), (643, 44440), (808, 35365), (1010, 28292), (1111, 25720), (1286, 22220), (2020, 14146), (2222, 12860), (2572, 11110), (3215, 8888), (4040, 7073), (4444, 6430), (5144, 5555)]