21230415

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{311}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 38840256

約数和(自身を除く): 17609841

約数列:

[1, 3, 5, 9, 15, 37, 41, 45, 111, 123, 185, 205, 311, 333, 369, 555, 615, 933, 1517, 1555, 1665, 1845, 2799, 4551, 4665, 7585, 11507, 12751, 13653, 13995, 22755, 34521, 38253, 57535, 63755, 68265, 103563, 114759, 172605, 191265, 471787, 517815, 573795, 1415361, 2358935, 4246083, 7076805, 21230415]

約数ペア:

[(1, 21230415), (3, 7076805), (5, 4246083), (9, 2358935), (15, 1415361), (37, 573795), (41, 517815), (45, 471787), (111, 191265), (123, 172605), (185, 114759), (205, 103563), (311, 68265), (333, 63755), (369, 57535), (555, 38253), (615, 34521), (933, 22755), (1517, 13995), (1555, 13653), (1665, 12751), (1845, 11507), (2799, 7585), (4551, 4665)]