28211755

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{211}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 42632352

約数和(自身を除く): 14420597

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 121, 143, 187, 211, 221, 605, 715, 935, 1055, 1105, 1573, 2057, 2321, 2431, 2743, 3587, 7865, 10285, 11605, 12155, 13715, 17935, 25531, 26741, 30173, 39457, 46631, 127655, 133705, 150865, 197285, 233155, 331903, 434027, 512941, 1659515, 2170135, 2564705, 5642351, 28211755]

約数ペア:

[(1, 28211755), (5, 5642351), (11, 2564705), (13, 2170135), (17, 1659515), (55, 512941), (65, 434027), (85, 331903), (121, 233155), (143, 197285), (187, 150865), (211, 133705), (221, 127655), (605, 46631), (715, 39457), (935, 30173), (1055, 26741), (1105, 25531), (1573, 17935), (2057, 13715), (2321, 12155), (2431, 11605), (2743, 10285), (3587, 7865)]