20981091

素因数分解:

$3^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1\times {\mathrm{271}}^1$

素因数の和:602

約数の個数: 16

約数和(自身を含む): 28435968

約数和(自身を除く): 7454877

約数列:

[1, 3, 131, 197, 271, 393, 591, 813, 25807, 35501, 53387, 77421, 106503, 160161, 6993697, 20981091]

約数ペア:

[(1, 20981091), (3, 6993697), (131, 160161), (197, 106503), (271, 77421), (393, 53387), (591, 35501), (813, 25807)]