21388503

素因数分解:

$3^1\times {\mathrm{59}}^1\times {\mathrm{149}}^1\times {\mathrm{811}}^1$

素因数の和:1022

約数の個数: 16

約数和(自身を含む): 29232000

約数和(自身を除く): 7843497

約数列:

[1, 3, 59, 149, 177, 447, 811, 2433, 8791, 26373, 47849, 120839, 143547, 362517, 7129501, 21388503]

約数ペア:

[(1, 21388503), (3, 7129501), (59, 362517), (149, 143547), (177, 120839), (447, 47849), (811, 26373), (2433, 8791)]