21675380

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4217}}^1$

素因数の和:4483

約数の個数: 24

約数和(自身を含む): 45706248

約数和(自身を除く): 24030868

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4217, 5140, 8434, 16868, 21085, 42170, 84340, 1083769, 2167538, 4335076, 5418845, 10837690, 21675380]

約数ペア:

[(1, 21675380), (2, 10837690), (4, 5418845), (5, 4335076), (10, 2167538), (20, 1083769), (257, 84340), (514, 42170), (1028, 21085), (1285, 16868), (2570, 8434), (4217, 5140)]