21681993

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{367}}^1\times {\mathrm{419}}^1$

素因数の和:836

約数の個数: 16

約数和(自身を含む): 29675520

約数和(自身を除く): 7993527

約数列:

[1, 3, 47, 141, 367, 419, 1101, 1257, 17249, 19693, 51747, 59079, 153773, 461319, 7227331, 21681993]

約数ペア:

[(1, 21681993), (3, 7227331), (47, 461319), (141, 153773), (367, 59079), (419, 51747), (1101, 19693), (1257, 17249)]