21404845

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{1049}}^1$

素因数の和:1125

約数の個数: 32

約数和(自身を含む): 32659200

約数和(自身を除く): 11254355

約数列:

[1, 5, 7, 11, 35, 53, 55, 77, 265, 371, 385, 583, 1049, 1855, 2915, 4081, 5245, 7343, 11539, 20405, 36715, 55597, 57695, 80773, 277985, 389179, 403865, 611567, 1945895, 3057835, 4280969, 21404845]

約数ペア:

[(1, 21404845), (5, 4280969), (7, 3057835), (11, 1945895), (35, 611567), (53, 403865), (55, 389179), (77, 277985), (265, 80773), (371, 57695), (385, 55597), (583, 36715), (1049, 20405), (1855, 11539), (2915, 7343), (4081, 5245)]