21025015

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{1523}}^1$

素因数の和:1790

約数の個数: 16

約数和(自身を含む): 27651456

約数和(自身を除く): 6626441

約数列:

[1, 5, 11, 55, 251, 1255, 1523, 2761, 7615, 13805, 16753, 83765, 382273, 1911365, 4205003, 21025015]

約数ペア:

[(1, 21025015), (5, 4205003), (11, 1911365), (55, 382273), (251, 83765), (1255, 16753), (1523, 13805), (2761, 7615)]