21318969

素因数分解:

$3^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{449}}^1$

素因数の和:502

約数の個数: 48

約数和(自身を含む): 36936000

約数和(自身を除く): 15617031

約数列:

[1, 3, 7, 17, 19, 21, 49, 51, 57, 119, 133, 147, 323, 357, 399, 449, 833, 931, 969, 1347, 2261, 2499, 2793, 3143, 6783, 7633, 8531, 9429, 15827, 22001, 22899, 25593, 47481, 53431, 59717, 66003, 145027, 160293, 179151, 374017, 418019, 435081, 1015189, 1122051, 1254057, 3045567, 7106323, 21318969]

約数ペア:

[(1, 21318969), (3, 7106323), (7, 3045567), (17, 1254057), (19, 1122051), (21, 1015189), (49, 435081), (51, 418019), (57, 374017), (119, 179151), (133, 160293), (147, 145027), (323, 66003), (357, 59717), (399, 53431), (449, 47481), (833, 25593), (931, 22899), (969, 22001), (1347, 15827), (2261, 9429), (2499, 8531), (2793, 7633), (3143, 6783)]