21191414

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{6449}}^1$

素因数の和:6535

約数の個数: 16

約数和(自身を含む): 33436800

約数和(自身を除く): 12245386

約数列:

[1, 2, 31, 53, 62, 106, 1643, 3286, 6449, 12898, 199919, 341797, 399838, 683594, 10595707, 21191414]

約数ペア:

[(1, 21191414), (2, 10595707), (31, 683594), (53, 399838), (62, 341797), (106, 199919), (1643, 12898), (3286, 6449)]