20847981

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{12893}}^1$

素因数の和:12921

約数の個数: 24

約数和(自身を含む): 35277984

約数和(自身を除く): 14430003

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 539, 1617, 12893, 38679, 90251, 141823, 270753, 425469, 631757, 992761, 1895271, 2978283, 6949327, 20847981]

約数ペア:

[(1, 20847981), (3, 6949327), (7, 2978283), (11, 1895271), (21, 992761), (33, 631757), (49, 425469), (77, 270753), (147, 141823), (231, 90251), (539, 38679), (1617, 12893)]