21997930

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30983}}^1$

素因数の和:31061

約数の個数: 16

約数和(自身を含む): 40155264

約数和(自身を除く): 18157334

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30983, 61966, 154915, 309830, 2199793, 4399586, 10998965, 21997930]

約数ペア:

[(1, 21997930), (2, 10998965), (5, 4399586), (10, 2199793), (71, 309830), (142, 154915), (355, 61966), (710, 30983)]