21758891

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:184

約数の個数: 32

約数和(自身を含む): 28416000

約数和(自身を除く): 6657109

約数列:

[1, 7, 11, 49, 73, 77, 79, 343, 511, 539, 553, 803, 869, 3577, 3773, 3871, 5621, 5767, 6083, 25039, 27097, 39347, 40369, 42581, 63437, 275429, 282583, 298067, 444059, 1978081, 3108413, 21758891]

約数ペア:

[(1, 21758891), (7, 3108413), (11, 1978081), (49, 444059), (73, 298067), (77, 282583), (79, 275429), (343, 63437), (511, 42581), (539, 40369), (553, 39347), (803, 27097), (869, 25039), (3577, 6083), (3773, 5767), (3871, 5621)]