21906213

素因数分解:

$3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{7963}}^1$

素因数の和:8104

約数の個数: 16

約数和(自身を含む): 33639936

約数和(自身を除く): 11733723

約数列:

[1, 3, 7, 21, 131, 393, 917, 2751, 7963, 23889, 55741, 167223, 1043153, 3129459, 7302071, 21906213]

約数ペア:

[(1, 21906213), (3, 7302071), (7, 3129459), (21, 1043153), (131, 167223), (393, 55741), (917, 23889), (2751, 7963)]