81320020

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{76717}}^1$

素因数の和:76779

約数の個数: 24

約数和(自身を含む): 173996424

約数和(自身を除く): 92676404

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 76717, 153434, 306868, 383585, 767170, 1534340, 4066001, 8132002, 16264004, 20330005, 40660010, 81320020]

約数ペア:

[(1, 81320020), (2, 40660010), (4, 20330005), (5, 16264004), (10, 8132002), (20, 4066001), (53, 1534340), (106, 767170), (212, 383585), (265, 306868), (530, 153434), (1060, 76717)]