21147945

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15493}}^1$

素因数の和:15521

約数の個数: 32

約数和(自身を含む): 41647872

約数和(自身を除く): 20499927

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15493, 46479, 77465, 108451, 201409, 232395, 325353, 542255, 604227, 1007045, 1409863, 1626765, 3021135, 4229589, 7049315, 21147945]

約数ペア:

[(1, 21147945), (3, 7049315), (5, 4229589), (7, 3021135), (13, 1626765), (15, 1409863), (21, 1007045), (35, 604227), (39, 542255), (65, 325353), (91, 232395), (105, 201409), (195, 108451), (273, 77465), (455, 46479), (1365, 15493)]