21284487

素因数分解:

$3^2\times 7^1\times {\mathrm{131}}^1\times {\mathrm{2579}}^1$

素因数の和:2723

約数の個数: 24

約数和(自身を含む): 35418240

約数和(自身を除く): 14133753

約数列:

[1, 3, 7, 9, 21, 63, 131, 393, 917, 1179, 2579, 2751, 7737, 8253, 18053, 23211, 54159, 162477, 337849, 1013547, 2364943, 3040641, 7094829, 21284487]

約数ペア:

[(1, 21284487), (3, 7094829), (7, 3040641), (9, 2364943), (21, 1013547), (63, 337849), (131, 162477), (393, 54159), (917, 23211), (1179, 18053), (2579, 8253), (2751, 7737)]