21372575

素因数分解:

$5^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{239}}^1$

素因数の和:336

約数の個数: 36

約数和(自身を含む): 31381920

約数和(自身を除く): 10009345

約数列:

[1, 5, 7, 25, 35, 49, 73, 175, 239, 245, 365, 511, 1195, 1225, 1673, 1825, 2555, 3577, 5975, 8365, 11711, 12775, 17447, 17885, 41825, 58555, 87235, 89425, 122129, 292775, 436175, 610645, 854903, 3053225, 4274515, 21372575]

約数ペア:

[(1, 21372575), (5, 4274515), (7, 3053225), (25, 854903), (35, 610645), (49, 436175), (73, 292775), (175, 122129), (239, 89425), (245, 87235), (365, 58555), (511, 41825), (1195, 17885), (1225, 17447), (1673, 12775), (1825, 11711), (2555, 8365), (3577, 5975)]