20408245

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:142

約数の個数: 64

約数和(自身を含む): 32223744

約数和(自身を除く): 11815499

約数列:

[1, 5, 11, 13, 17, 23, 55, 65, 73, 85, 115, 143, 187, 221, 253, 299, 365, 391, 715, 803, 935, 949, 1105, 1241, 1265, 1495, 1679, 1955, 2431, 3289, 4015, 4301, 4745, 5083, 6205, 8395, 10439, 12155, 13651, 16133, 16445, 18469, 21505, 21827, 25415, 28543, 52195, 55913, 68255, 80665, 92345, 109135, 142715, 177463, 240097, 279565, 313973, 371059, 887315, 1200485, 1569865, 1855295, 4081649, 20408245]

約数ペア:

[(1, 20408245), (5, 4081649), (11, 1855295), (13, 1569865), (17, 1200485), (23, 887315), (55, 371059), (65, 313973), (73, 279565), (85, 240097), (115, 177463), (143, 142715), (187, 109135), (221, 92345), (253, 80665), (299, 68255), (365, 55913), (391, 52195), (715, 28543), (803, 25415), (935, 21827), (949, 21505), (1105, 18469), (1241, 16445), (1265, 16133), (1495, 13651), (1679, 12155), (1955, 10439), (2431, 8395), (3289, 6205), (4015, 5083), (4301, 4745)]