21093885

素因数分解:

$3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:195

約数の個数: 64

約数和(自身を含む): 39836160

約数和(自身を除く): 18742275

約数列:

[1, 3, 5, 9, 15, 27, 37, 41, 45, 103, 111, 123, 135, 185, 205, 309, 333, 369, 515, 555, 615, 927, 999, 1107, 1517, 1545, 1665, 1845, 2781, 3811, 4223, 4551, 4635, 4995, 5535, 7585, 11433, 12669, 13653, 13905, 19055, 21115, 22755, 34299, 38007, 40959, 57165, 63345, 68265, 102897, 114021, 156251, 171495, 190035, 204795, 468753, 514485, 570105, 781255, 1406259, 2343765, 4218777, 7031295, 21093885]

約数ペア:

[(1, 21093885), (3, 7031295), (5, 4218777), (9, 2343765), (15, 1406259), (27, 781255), (37, 570105), (41, 514485), (45, 468753), (103, 204795), (111, 190035), (123, 171495), (135, 156251), (185, 114021), (205, 102897), (309, 68265), (333, 63345), (369, 57165), (515, 40959), (555, 38007), (615, 34299), (927, 22755), (999, 21115), (1107, 19055), (1517, 13905), (1545, 13653), (1665, 12669), (1845, 11433), (2781, 7585), (3811, 5535), (4223, 4995), (4551, 4635)]