19975581

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{157}}^1\times {\mathrm{211}}^1$

素因数の和:441

約数の個数: 24

約数和(自身を含む): 29610464

約数和(自身を除く): 9634883

約数列:

[1, 3, 9, 67, 157, 201, 211, 471, 603, 633, 1413, 1899, 10519, 14137, 31557, 33127, 42411, 94671, 99381, 127233, 298143, 2219509, 6658527, 19975581]

約数ペア:

[(1, 19975581), (3, 6658527), (9, 2219509), (67, 298143), (157, 127233), (201, 99381), (211, 94671), (471, 42411), (603, 33127), (633, 31557), (1413, 14137), (1899, 10519)]