21264208

素因数分解:

$2^4\times 7^1\times {\mathrm{189859}}^1$

素因数の和:189874

約数の個数: 20

約数和(自身を含む): 47085280

約数和(自身を除く): 25821072

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 189859, 379718, 759436, 1329013, 1518872, 2658026, 3037744, 5316052, 10632104, 21264208]

約数ペア:

[(1, 21264208), (2, 10632104), (4, 5316052), (7, 3037744), (8, 2658026), (14, 1518872), (16, 1329013), (28, 759436), (56, 379718), (112, 189859)]