21509908

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{24781}}^1$

素因数の和:24823

約数の個数: 24

約数和(自身を含む): 44409344

約数和(自身を除く): 22899436

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 217, 434, 868, 24781, 49562, 99124, 173467, 346934, 693868, 768211, 1536422, 3072844, 5377477, 10754954, 21509908]

約数ペア:

[(1, 21509908), (2, 10754954), (4, 5377477), (7, 3072844), (14, 1536422), (28, 768211), (31, 693868), (62, 346934), (124, 173467), (217, 99124), (434, 49562), (868, 24781)]