21208528

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{120503}}^1$

素因数の和:120522

約数の個数: 20

約数和(自身を含む): 44827488

約数和(自身を除く): 23618960

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 120503, 241006, 482012, 964024, 1325533, 1928048, 2651066, 5302132, 10604264, 21208528]

約数ペア:

[(1, 21208528), (2, 10604264), (4, 5302132), (8, 2651066), (11, 1928048), (16, 1325533), (22, 964024), (44, 482012), (88, 241006), (176, 120503)]