21981608

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{439}}^1\times {\mathrm{569}}^1$

素因数の和:1025

約数の個数: 32

約数和(自身を含む): 45144000

約数和(自身を除く): 23162392

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 439, 569, 878, 1138, 1756, 2276, 3512, 4552, 4829, 6259, 9658, 12518, 19316, 25036, 38632, 50072, 249791, 499582, 999164, 1998328, 2747701, 5495402, 10990804, 21981608]

約数ペア:

[(1, 21981608), (2, 10990804), (4, 5495402), (8, 2747701), (11, 1998328), (22, 999164), (44, 499582), (88, 249791), (439, 50072), (569, 38632), (878, 25036), (1138, 19316), (1756, 12518), (2276, 9658), (3512, 6259), (4552, 4829)]