21243513

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 31124736

約数和(自身を除く): 9881223

約数列:

[1, 3, 23, 37, 53, 69, 111, 157, 159, 471, 851, 1219, 1961, 2553, 3611, 3657, 5809, 5883, 8321, 10833, 17427, 24963, 45103, 133607, 135309, 191383, 307877, 400821, 574149, 923631, 7081171, 21243513]

約数ペア:

[(1, 21243513), (3, 7081171), (23, 923631), (37, 574149), (53, 400821), (69, 307877), (111, 191383), (157, 135309), (159, 133607), (471, 45103), (851, 24963), (1219, 17427), (1961, 10833), (2553, 8321), (3611, 5883), (3657, 5809)]