21487235

素因数分解:

$5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1$

素因数の和:121

約数の個数: 64

約数和(自身を含む): 35251200

約数和(自身を除く): 13763965

約数列:

[1, 5, 7, 11, 17, 35, 49, 55, 67, 77, 85, 119, 187, 245, 335, 343, 385, 469, 539, 595, 737, 833, 935, 1139, 1309, 1715, 2345, 2695, 3283, 3685, 3773, 4165, 5159, 5695, 5831, 6545, 7973, 9163, 12529, 16415, 18865, 22981, 25795, 29155, 36113, 39865, 45815, 55811, 62645, 64141, 87703, 114905, 180565, 252791, 279055, 320705, 390677, 438515, 613921, 1263955, 1953385, 3069605, 4297447, 21487235]

約数ペア:

[(1, 21487235), (5, 4297447), (7, 3069605), (11, 1953385), (17, 1263955), (35, 613921), (49, 438515), (55, 390677), (67, 320705), (77, 279055), (85, 252791), (119, 180565), (187, 114905), (245, 87703), (335, 64141), (343, 62645), (385, 55811), (469, 45815), (539, 39865), (595, 36113), (737, 29155), (833, 25795), (935, 22981), (1139, 18865), (1309, 16415), (1715, 12529), (2345, 9163), (2695, 7973), (3283, 6545), (3685, 5831), (3773, 5695), (4165, 5159)]