21871993

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{3557}}^1$

素因数の和:3624

約数の個数: 16

約数和(自身を含む): 26300736

約数和(自身を除く): 4428743

約数列:

[1, 11, 13, 43, 143, 473, 559, 3557, 6149, 39127, 46241, 152951, 508651, 1682461, 1988363, 21871993]

約数ペア:

[(1, 21871993), (11, 1988363), (13, 1682461), (43, 508651), (143, 152951), (473, 46241), (559, 39127), (3557, 6149)]