398304820

素因数分解:

$2^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{115117}}^1$

素因数の和:115299

約数の個数: 24

約数和(自身を含む): 841282344

約数和(自身を除く): 442977524

約数列:

[1, 2, 4, 5, 10, 20, 173, 346, 692, 865, 1730, 3460, 115117, 230234, 460468, 575585, 1151170, 2302340, 19915241, 39830482, 79660964, 99576205, 199152410, 398304820]

約数ペア:

[(1, 398304820), (2, 199152410), (4, 99576205), (5, 79660964), (10, 39830482), (20, 19915241), (173, 2302340), (346, 1151170), (692, 575585), (865, 460468), (1730, 230234), (3460, 115117)]