18390515

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{89}}^1$

素因数の和:152

約数の個数: 48

約数和(自身を含む): 27851040

約数和(自身を除く): 9460525

約数列:

[1, 5, 11, 13, 17, 55, 65, 85, 89, 143, 187, 221, 289, 445, 715, 935, 979, 1105, 1157, 1445, 1513, 2431, 3179, 3757, 4895, 5785, 7565, 12155, 12727, 15895, 16643, 18785, 19669, 25721, 41327, 63635, 83215, 98345, 128605, 206635, 216359, 282931, 334373, 1081795, 1414655, 1671865, 3678103, 18390515]

約数ペア:

[(1, 18390515), (5, 3678103), (11, 1671865), (13, 1414655), (17, 1081795), (55, 334373), (65, 282931), (85, 216359), (89, 206635), (143, 128605), (187, 98345), (221, 83215), (289, 63635), (445, 41327), (715, 25721), (935, 19669), (979, 18785), (1105, 16643), (1157, 15895), (1445, 12727), (1513, 12155), (2431, 7565), (3179, 5785), (3757, 4895)]