21003866

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{18787}}^1$

素因数の和:18845

約数の個数: 16

約数和(自身を含む): 34720224

約数和(自身を除く): 13716358

約数列:

[1, 2, 13, 26, 43, 86, 559, 1118, 18787, 37574, 244231, 488462, 807841, 1615682, 10501933, 21003866]

約数ペア:

[(1, 21003866), (2, 10501933), (13, 1615682), (26, 807841), (43, 488462), (86, 244231), (559, 37574), (1118, 18787)]