21427203

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 33693184

約数和(自身を除く): 12265981

約数列:

[1, 3, 7, 21, 67, 97, 157, 201, 291, 469, 471, 679, 1099, 1407, 2037, 3297, 6499, 10519, 15229, 19497, 31557, 45493, 45687, 73633, 106603, 136479, 220899, 319809, 1020343, 3061029, 7142401, 21427203]

約数ペア:

[(1, 21427203), (3, 7142401), (7, 3061029), (21, 1020343), (67, 319809), (97, 220899), (157, 136479), (201, 106603), (291, 73633), (469, 45687), (471, 45493), (679, 31557), (1099, 19497), (1407, 15229), (2037, 10519), (3297, 6499)]