20981248

素因数分解:

$2^9\times {\mathrm{43}}^1\times {\mathrm{953}}^1$

素因数の和:1014

約数の個数: 40

約数和(自身を含む): 42941448

約数和(自身を除く): 21960200

約数列:

[1, 2, 4, 8, 16, 32, 43, 64, 86, 128, 172, 256, 344, 512, 688, 953, 1376, 1906, 2752, 3812, 5504, 7624, 11008, 15248, 22016, 30496, 40979, 60992, 81958, 121984, 163916, 243968, 327832, 487936, 655664, 1311328, 2622656, 5245312, 10490624, 20981248]

約数ペア:

[(1, 20981248), (2, 10490624), (4, 5245312), (8, 2622656), (16, 1311328), (32, 655664), (43, 487936), (64, 327832), (86, 243968), (128, 163916), (172, 121984), (256, 81958), (344, 60992), (512, 40979), (688, 30496), (953, 22016), (1376, 15248), (1906, 11008), (2752, 7624), (3812, 5504)]