21249748

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{2447}}^1$

素因数の和:2631

約数の個数: 24

約数和(自身を含む): 40303872

約数和(自身を除く): 19054124

約数列:

[1, 2, 4, 13, 26, 52, 167, 334, 668, 2171, 2447, 4342, 4894, 8684, 9788, 31811, 63622, 127244, 408649, 817298, 1634596, 5312437, 10624874, 21249748]

約数ペア:

[(1, 21249748), (2, 10624874), (4, 5312437), (13, 1634596), (26, 817298), (52, 408649), (167, 127244), (334, 63622), (668, 31811), (2171, 9788), (2447, 8684), (4342, 4894)]