21124143

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 13470417

約数列:

[1, 3, 9, 19, 23, 41, 57, 69, 123, 131, 171, 207, 369, 393, 437, 779, 943, 1179, 1311, 2337, 2489, 2829, 3013, 3933, 5371, 7011, 7467, 8487, 9039, 16113, 17917, 22401, 27117, 48339, 53751, 57247, 102049, 123533, 161253, 171741, 306147, 370599, 515223, 918441, 1111797, 2347127, 7041381, 21124143]

約数ペア:

[(1, 21124143), (3, 7041381), (9, 2347127), (19, 1111797), (23, 918441), (41, 515223), (57, 370599), (69, 306147), (123, 171741), (131, 161253), (171, 123533), (207, 102049), (369, 57247), (393, 53751), (437, 48339), (779, 27117), (943, 22401), (1179, 17917), (1311, 16113), (2337, 9039), (2489, 8487), (2829, 7467), (3013, 7011), (3933, 5371)]