20716143

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1\times {\mathrm{151}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 11969937

約数列:

[1, 3, 7, 21, 47, 139, 141, 151, 329, 417, 453, 973, 987, 1057, 2919, 3171, 6533, 7097, 19599, 20989, 21291, 45731, 49679, 62967, 137193, 146923, 149037, 440769, 986483, 2959449, 6905381, 20716143]

約数ペア:

[(1, 20716143), (3, 6905381), (7, 2959449), (21, 986483), (47, 440769), (139, 149037), (141, 146923), (151, 137193), (329, 62967), (417, 49679), (453, 45731), (973, 21291), (987, 20989), (1057, 19599), (2919, 7097), (3171, 6533)]