18718940

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{4751}}^1$

素因数の和:4957

約数の個数: 24

約数和(自身を含む): 39517632

約数和(自身を除く): 20798692

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 4751, 9502, 19004, 23755, 47510, 95020, 935947, 1871894, 3743788, 4679735, 9359470, 18718940]

約数ペア:

[(1, 18718940), (2, 9359470), (4, 4679735), (5, 3743788), (10, 1871894), (20, 935947), (197, 95020), (394, 47510), (788, 23755), (985, 19004), (1970, 9502), (3940, 4751)]