21137823

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17659}}^1$

素因数の和:17691

約数の個数: 24

約数和(自身を含む): 36732800

約数和(自身を除く): 15594977

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17659, 52977, 123613, 158931, 335521, 370839, 1006563, 1112517, 2348647, 3019689, 7045941, 21137823]

約数ペア:

[(1, 21137823), (3, 7045941), (7, 3019689), (9, 2348647), (19, 1112517), (21, 1006563), (57, 370839), (63, 335521), (133, 158931), (171, 123613), (399, 52977), (1197, 17659)]