21489988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{21751}}^1$

素因数の和:21787

約数の個数: 24

約数和(自身を含む): 42633920

約数和(自身を除く): 21143932

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 988, 21751, 43502, 87004, 282763, 413269, 565526, 826538, 1131052, 1653076, 5372497, 10744994, 21489988]

約数ペア:

[(1, 21489988), (2, 10744994), (4, 5372497), (13, 1653076), (19, 1131052), (26, 826538), (38, 565526), (52, 413269), (76, 282763), (247, 87004), (494, 43502), (988, 21751)]