18730855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1$

素因数の和:136

約数の個数: 64

約数和(自身を含む): 29611008

約数和(自身を除く): 10880153

約数列:

[1, 5, 11, 13, 17, 23, 55, 65, 67, 85, 115, 143, 187, 221, 253, 299, 335, 391, 715, 737, 871, 935, 1105, 1139, 1265, 1495, 1541, 1955, 2431, 3289, 3685, 4301, 4355, 5083, 5695, 7705, 9581, 12155, 12529, 14807, 16445, 16951, 20033, 21505, 25415, 26197, 47905, 55913, 62645, 74035, 84755, 100165, 130985, 162877, 220363, 279565, 288167, 340561, 814385, 1101815, 1440835, 1702805, 3746171, 18730855]

約数ペア:

[(1, 18730855), (5, 3746171), (11, 1702805), (13, 1440835), (17, 1101815), (23, 814385), (55, 340561), (65, 288167), (67, 279565), (85, 220363), (115, 162877), (143, 130985), (187, 100165), (221, 84755), (253, 74035), (299, 62645), (335, 55913), (391, 47905), (715, 26197), (737, 25415), (871, 21505), (935, 20033), (1105, 16951), (1139, 16445), (1265, 14807), (1495, 12529), (1541, 12155), (1955, 9581), (2431, 7705), (3289, 5695), (3685, 5083), (4301, 4355)]