20178227517

素因数分解:

$3^1\times 7^1\times {\mathrm{691}}^1\times {\mathrm{1390547}}^1$

素因数の和:1391248

約数の個数: 16

約数和(自身を含む): 30792294912

約数和(自身を除く): 10614067395

約数列:

[1, 3, 7, 21, 691, 2073, 4837, 14511, 1390547, 4171641, 9733829, 29201487, 960867977, 2882603931, 6726075839, 20178227517]

約数ペア:

[(1, 20178227517), (3, 6726075839), (7, 2882603931), (21, 960867977), (691, 29201487), (2073, 9733829), (4837, 4171641), (14511, 1390547)]