21690100

素因数分解:

$2^2\times 5^2\times {\mathrm{216901}}^1$

素因数の和:216915

約数の個数: 18

約数和(自身を含む): 47067734

約数和(自身を除く): 25377634

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 216901, 433802, 867604, 1084505, 2169010, 4338020, 5422525, 10845050, 21690100]

約数ペア:

[(1, 21690100), (2, 10845050), (4, 5422525), (5, 4338020), (10, 2169010), (20, 1084505), (25, 867604), (50, 433802), (100, 216901)]