21785908

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{421}}^1\times {\mathrm{761}}^1$

素因数の和:1203

約数の個数: 24

約数和(自身を含む): 40517064

約数和(自身を除く): 18731156

約数列:

[1, 2, 4, 17, 34, 68, 421, 761, 842, 1522, 1684, 3044, 7157, 12937, 14314, 25874, 28628, 51748, 320381, 640762, 1281524, 5446477, 10892954, 21785908]

約数ペア:

[(1, 21785908), (2, 10892954), (4, 5446477), (17, 1281524), (34, 640762), (68, 320381), (421, 51748), (761, 28628), (842, 25874), (1522, 14314), (1684, 12937), (3044, 7157)]