28165720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{64013}}^1$

素因数の和:64035

約数の個数: 32

約数和(自身を含む): 69135120

約数和(自身を除く): 40969400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 64013, 128026, 256052, 320065, 512104, 640130, 704143, 1280260, 1408286, 2560520, 2816572, 3520715, 5633144, 7041430, 14082860, 28165720]

約数ペア:

[(1, 28165720), (2, 14082860), (4, 7041430), (5, 5633144), (8, 3520715), (10, 2816572), (11, 2560520), (20, 1408286), (22, 1280260), (40, 704143), (44, 640130), (55, 512104), (88, 320065), (110, 256052), (220, 128026), (440, 64013)]