198778820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{320611}}^1$

素因数の和:320651

約数の個数: 24

約数和(自身を含む): 430902528

約数和(自身を除く): 232123708

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 320611, 641222, 1282444, 1603055, 3206110, 6412220, 9938941, 19877882, 39755764, 49694705, 99389410, 198778820]

約数ペア:

[(1, 198778820), (2, 99389410), (4, 49694705), (5, 39755764), (10, 19877882), (20, 9938941), (31, 6412220), (62, 3206110), (124, 1603055), (155, 1282444), (310, 641222), (620, 320611)]