21000733

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{41}}^2$

素因数の和:157

約数の個数: 18

約数和(自身を含む): 23953146

約数和(自身を除く): 2952413

約数列:

[1, 13, 31, 41, 403, 533, 961, 1271, 1681, 12493, 16523, 21853, 39401, 52111, 512213, 677443, 1615441, 21000733]

約数ペア:

[(1, 21000733), (13, 1615441), (31, 677443), (41, 512213), (403, 52111), (533, 39401), (961, 21853), (1271, 16523), (1681, 12493)]