21057784

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{271}}^1\times {\mathrm{883}}^1$

素因数の和:1171

約数の個数: 32

約数和(自身を含む): 43280640

約数和(自身を除く): 22222856

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 271, 542, 883, 1084, 1766, 2168, 2981, 3532, 5962, 7064, 9713, 11924, 19426, 23848, 38852, 77704, 239293, 478586, 957172, 1914344, 2632223, 5264446, 10528892, 21057784]

約数ペア:

[(1, 21057784), (2, 10528892), (4, 5264446), (8, 2632223), (11, 1914344), (22, 957172), (44, 478586), (88, 239293), (271, 77704), (542, 38852), (883, 23848), (1084, 19426), (1766, 11924), (2168, 9713), (2981, 7064), (3532, 5962)]