21294640

素因数分解:

$2^4\times 5^1\times {\mathrm{266183}}^1$

素因数の和:266196

約数の個数: 20

約数和(自身を含む): 49510224

約数和(自身を除く): 28215584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266183, 532366, 1064732, 1330915, 2129464, 2661830, 4258928, 5323660, 10647320, 21294640]

約数ペア:

[(1, 21294640), (2, 10647320), (4, 5323660), (5, 4258928), (8, 2661830), (10, 2129464), (16, 1330915), (20, 1064732), (40, 532366), (80, 266183)]