21420357

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{2069}}^1$

素因数の和:2125

約数の個数: 32

約数和(自身を含む): 35769600

約数和(自身を除く): 14349243

約数列:

[1, 3, 7, 17, 21, 29, 51, 87, 119, 203, 357, 493, 609, 1479, 2069, 3451, 6207, 10353, 14483, 35173, 43449, 60001, 105519, 180003, 246211, 420007, 738633, 1020017, 1260021, 3060051, 7140119, 21420357]

約数ペア:

[(1, 21420357), (3, 7140119), (7, 3060051), (17, 1260021), (21, 1020017), (29, 738633), (51, 420007), (87, 246211), (119, 180003), (203, 105519), (357, 60001), (493, 43449), (609, 35173), (1479, 14483), (2069, 10353), (3451, 6207)]