21220428

素因数分解:

$2^2\times 3^1\times {\mathrm{131}}^1\times {\mathrm{13499}}^1$

素因数の和:13637

約数の個数: 24

約数和(自身を含む): 49896000

約数和(自身を除く): 28675572

約数列:

[1, 2, 3, 4, 6, 12, 131, 262, 393, 524, 786, 1572, 13499, 26998, 40497, 53996, 80994, 161988, 1768369, 3536738, 5305107, 7073476, 10610214, 21220428]

約数ペア:

[(1, 21220428), (2, 10610214), (3, 7073476), (4, 5305107), (6, 3536738), (12, 1768369), (131, 161988), (262, 80994), (393, 53996), (524, 40497), (786, 26998), (1572, 13499)]