81771890

素因数分解:

$2^1\times 5^1\times {\mathrm{1021}}^1\times {\mathrm{8009}}^1$

素因数の和:9037

約数の個数: 16

約数和(自身を含む): 147351960

約数和(自身を除く): 65580070

約数列:

[1, 2, 5, 10, 1021, 2042, 5105, 8009, 10210, 16018, 40045, 80090, 8177189, 16354378, 40885945, 81771890]

約数ペア:

[(1, 81771890), (2, 40885945), (5, 16354378), (10, 8177189), (1021, 80090), (2042, 40045), (5105, 16018), (8009, 10210)]