21011216

素因数分解:

$2^4\times {\mathrm{199}}^1\times {\mathrm{6599}}^1$

素因数の和:6806

約数の個数: 20

約数和(自身を含む): 40920000

約数和(自身を除く): 19908784

約数列:

[1, 2, 4, 8, 16, 199, 398, 796, 1592, 3184, 6599, 13198, 26396, 52792, 105584, 1313201, 2626402, 5252804, 10505608, 21011216]

約数ペア:

[(1, 21011216), (2, 10505608), (4, 5252804), (8, 2626402), (16, 1313201), (199, 105584), (398, 52792), (796, 26396), (1592, 13198), (3184, 6599)]