21173823

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{547}}^1$

素因数の和:604

約数の個数: 48

約数和(自身を含む): 36930816

約数和(自身を除く): 15756993

約数列:

[1, 3, 9, 11, 17, 23, 33, 51, 69, 99, 153, 187, 207, 253, 391, 547, 561, 759, 1173, 1641, 1683, 2277, 3519, 4301, 4923, 6017, 9299, 12581, 12903, 18051, 27897, 37743, 38709, 54153, 83691, 102289, 113229, 138391, 213877, 306867, 415173, 641631, 920601, 1245519, 1924893, 2352647, 7057941, 21173823]

約数ペア:

[(1, 21173823), (3, 7057941), (9, 2352647), (11, 1924893), (17, 1245519), (23, 920601), (33, 641631), (51, 415173), (69, 306867), (99, 213877), (153, 138391), (187, 113229), (207, 102289), (253, 83691), (391, 54153), (547, 38709), (561, 37743), (759, 27897), (1173, 18051), (1641, 12903), (1683, 12581), (2277, 9299), (3519, 6017), (4301, 4923)]