21496251

素因数分解:

$3^1\times 7^2\times {\mathrm{257}}^1\times {\mathrm{569}}^1$

素因数の和:843

約数の個数: 24

約数和(自身を含む): 33529680

約数和(自身を除く): 12033429

約数列:

[1, 3, 7, 21, 49, 147, 257, 569, 771, 1707, 1799, 3983, 5397, 11949, 12593, 27881, 37779, 83643, 146233, 438699, 1023631, 3070893, 7165417, 21496251]

約数ペア:

[(1, 21496251), (3, 7165417), (7, 3070893), (21, 1023631), (49, 438699), (147, 146233), (257, 83643), (569, 37779), (771, 27881), (1707, 12593), (1799, 11949), (3983, 5397)]