21244279

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{163}}^1\times {\mathrm{433}}^1$

素因数の和:646

約数の個数: 16

約数和(自身を含む): 25053952

約数和(自身を除く): 3809673

約数列:

[1, 7, 43, 163, 301, 433, 1141, 3031, 7009, 18619, 49063, 70579, 130333, 494053, 3034897, 21244279]

約数ペア:

[(1, 21244279), (7, 3034897), (43, 494053), (163, 130333), (301, 70579), (433, 49063), (1141, 18619), (3031, 7009)]