21903561

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{42697}}^1$

素因数の和:42725

約数の個数: 16

約数和(自身を含む): 34158400

約数和(自身を除く): 12254839

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 42697, 128091, 384273, 811243, 1152819, 2433729, 7301187, 21903561]

約数ペア:

[(1, 21903561), (3, 7301187), (9, 2433729), (19, 1152819), (27, 811243), (57, 384273), (171, 128091), (513, 42697)]