21497950

素因数分解:

$2^1\times 5^2\times {\mathrm{89}}^1\times {\mathrm{4831}}^1$

素因数の和:4932

約数の個数: 24

約数和(自身を含む): 40443840

約数和(自身を除く): 18945890

約数列:

[1, 2, 5, 10, 25, 50, 89, 178, 445, 890, 2225, 4450, 4831, 9662, 24155, 48310, 120775, 241550, 429959, 859918, 2149795, 4299590, 10748975, 21497950]

約数ペア:

[(1, 21497950), (2, 10748975), (5, 4299590), (10, 2149795), (25, 859918), (50, 429959), (89, 241550), (178, 120775), (445, 48310), (890, 24155), (2225, 9662), (4450, 4831)]