19800898

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:346

約数の個数: 32

約数和(自身を含む): 33264000

約数和(自身を除く): 13463102

約数列:

[1, 2, 13, 26, 43, 86, 89, 178, 199, 398, 559, 1118, 1157, 2314, 2587, 3827, 5174, 7654, 8557, 17114, 17711, 35422, 49751, 99502, 111241, 222482, 230243, 460486, 761573, 1523146, 9900449, 19800898]

約数ペア:

[(1, 19800898), (2, 9900449), (13, 1523146), (26, 761573), (43, 460486), (86, 230243), (89, 222482), (178, 111241), (199, 99502), (398, 49751), (559, 35422), (1118, 17711), (1157, 17114), (2314, 8557), (2587, 7654), (3827, 5174)]