81521060

素因数分解:

$2^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{23561}}^1$

素因数の和:23743

約数の個数: 24

約数和(自身を含む): 172191096

約数和(自身を除く): 90670036

約数列:

[1, 2, 4, 5, 10, 20, 173, 346, 692, 865, 1730, 3460, 23561, 47122, 94244, 117805, 235610, 471220, 4076053, 8152106, 16304212, 20380265, 40760530, 81521060]

約数ペア:

[(1, 81521060), (2, 40760530), (4, 20380265), (5, 16304212), (10, 8152106), (20, 4076053), (173, 471220), (346, 235610), (692, 117805), (865, 94244), (1730, 47122), (3460, 23561)]