21268989

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2837}}^1$

素因数の和:2874

約数の個数: 36

約数和(自身を含む): 37853244

約数和(自身を除く): 16584255

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 357, 441, 833, 1071, 2499, 2837, 7497, 8511, 19859, 25533, 48229, 59577, 139013, 144687, 178731, 337603, 417039, 434061, 1012809, 1251117, 2363221, 3038427, 7089663, 21268989]

約数ペア:

[(1, 21268989), (3, 7089663), (7, 3038427), (9, 2363221), (17, 1251117), (21, 1012809), (49, 434061), (51, 417039), (63, 337603), (119, 178731), (147, 144687), (153, 139013), (357, 59577), (441, 48229), (833, 25533), (1071, 19859), (2499, 8511), (2837, 7497)]