20447005

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{293}}^1\times {\mathrm{821}}^1$

素因数の和:1136

約数の個数: 16

約数和(自身を含む): 26100144

約数和(自身を除く): 5653139

約数列:

[1, 5, 17, 85, 293, 821, 1465, 4105, 4981, 13957, 24905, 69785, 240553, 1202765, 4089401, 20447005]

約数ペア:

[(1, 20447005), (5, 4089401), (17, 1202765), (85, 240553), (293, 69785), (821, 24905), (1465, 13957), (4105, 4981)]