21249415

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{31}}^1\times {\mathrm{103}}^1$

素因数の和:172

約数の個数: 32

約数和(自身を含む): 29233152

約数和(自身を除く): 7983737

約数列:

[1, 5, 11, 31, 55, 103, 121, 155, 341, 515, 605, 1133, 1331, 1705, 3193, 3751, 5665, 6655, 12463, 15965, 18755, 35123, 41261, 62315, 137093, 175615, 206305, 386353, 685465, 1931765, 4249883, 21249415]

約数ペア:

[(1, 21249415), (5, 4249883), (11, 1931765), (31, 685465), (55, 386353), (103, 206305), (121, 175615), (155, 137093), (341, 62315), (515, 41261), (605, 35123), (1133, 18755), (1331, 15965), (1705, 12463), (3193, 6655), (3751, 5665)]