21219981

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{3607}}^1$

素因数の和:3700

約数の個数: 16

約数和(自身を含む): 29614464

約数和(自身を除く): 8394483

約数列:

[1, 3, 37, 53, 111, 159, 1961, 3607, 5883, 10821, 133459, 191171, 400377, 573513, 7073327, 21219981]

約数ペア:

[(1, 21219981), (3, 7073327), (37, 573513), (53, 400377), (111, 191171), (159, 133459), (1961, 10821), (3607, 5883)]