21091920305

素因数分解:

$5^1\times {\mathrm{251}}^1\times {\mathrm{401}}^1\times {\mathrm{41911}}^1$

素因数の和:42568

約数の個数: 16

約数和(自身を含む): 25475119488

約数和(自身を除く): 4383199183

約数列:

[1, 5, 251, 401, 1255, 2005, 41911, 100651, 209555, 503255, 10519661, 16806311, 52598305, 84031555, 4218384061, 21091920305]

約数ペア:

[(1, 21091920305), (5, 4218384061), (251, 84031555), (401, 52598305), (1255, 16806311), (2005, 10519661), (41911, 503255), (100651, 209555)]