21958713

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 40814280

約数和(自身を除く): 18855567

約数列:

[1, 3, 7, 9, 17, 21, 29, 49, 51, 63, 87, 101, 119, 147, 153, 203, 261, 303, 357, 441, 493, 609, 707, 833, 909, 1071, 1421, 1479, 1717, 1827, 2121, 2499, 2929, 3451, 4263, 4437, 4949, 5151, 6363, 7497, 8787, 10353, 12019, 12789, 14847, 15453, 20503, 24157, 26361, 31059, 36057, 44541, 49793, 61509, 72471, 84133, 108171, 143521, 149379, 184527, 217413, 252399, 348551, 430563, 448137, 757197, 1045653, 1291689, 2439857, 3136959, 7319571, 21958713]

約数ペア:

[(1, 21958713), (3, 7319571), (7, 3136959), (9, 2439857), (17, 1291689), (21, 1045653), (29, 757197), (49, 448137), (51, 430563), (63, 348551), (87, 252399), (101, 217413), (119, 184527), (147, 149379), (153, 143521), (203, 108171), (261, 84133), (303, 72471), (357, 61509), (441, 49793), (493, 44541), (609, 36057), (707, 31059), (833, 26361), (909, 24157), (1071, 20503), (1421, 15453), (1479, 14847), (1717, 12789), (1827, 12019), (2121, 10353), (2499, 8787), (2929, 7497), (3451, 6363), (4263, 5151), (4437, 4949)]