21018117

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1\times {\mathrm{1597}}^1$

素因数の和:1748

約数の個数: 16

約数和(自身を含む): 28994112

約数和(自身を除く): 7975995

約数列:

[1, 3, 41, 107, 123, 321, 1597, 4387, 4791, 13161, 65477, 170879, 196431, 512637, 7006039, 21018117]

約数ペア:

[(1, 21018117), (3, 7006039), (41, 512637), (107, 196431), (123, 170879), (321, 65477), (1597, 13161), (4387, 4791)]