21006640

素因数分解:

$2^4\times 5^1\times {\mathrm{262583}}^1$

素因数の和:262596

約数の個数: 20

約数和(自身を含む): 48840624

約数和(自身を除く): 27833984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262583, 525166, 1050332, 1312915, 2100664, 2625830, 4201328, 5251660, 10503320, 21006640]

約数ペア:

[(1, 21006640), (2, 10503320), (4, 5251660), (5, 4201328), (8, 2625830), (10, 2100664), (16, 1312915), (20, 1050332), (40, 525166), (80, 262583)]