21726551

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{233}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 27849744

約数和(自身を除く): 6123193

約数列:

[1, 7, 11, 49, 77, 173, 233, 539, 1211, 1631, 1903, 2563, 8477, 11417, 13321, 17941, 40309, 93247, 125587, 282163, 443399, 1975141, 3103793, 21726551]

約数ペア:

[(1, 21726551), (7, 3103793), (11, 1975141), (49, 443399), (77, 282163), (173, 125587), (233, 93247), (539, 40309), (1211, 17941), (1631, 13321), (1903, 11417), (2563, 8477)]