21511287

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17971}}^1$

素因数の和:18003

約数の個数: 24

約数和(自身を含む): 37381760

約数和(自身を除く): 15870473

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17971, 53913, 125797, 161739, 341449, 377391, 1024347, 1132173, 2390143, 3073041, 7170429, 21511287]

約数ペア:

[(1, 21511287), (3, 7170429), (7, 3073041), (9, 2390143), (19, 1132173), (21, 1024347), (57, 377391), (63, 341449), (133, 161739), (171, 125797), (399, 53913), (1197, 17971)]