21697580

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5507}}^1$

素因数の和:5713

約数の個数: 24

約数和(自身を含む): 45804528

約数和(自身を除く): 24106948

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5507, 11014, 22028, 27535, 55070, 110140, 1084879, 2169758, 4339516, 5424395, 10848790, 21697580]

約数ペア:

[(1, 21697580), (2, 10848790), (4, 5424395), (5, 4339516), (10, 2169758), (20, 1084879), (197, 110140), (394, 55070), (788, 27535), (985, 22028), (1970, 11014), (3940, 5507)]