21105789

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{947}}^1$

素因数の和:1009

約数の個数: 32

約数和(自身を含む): 32762880

約数和(自身を除く): 11657091

約数列:

[1, 3, 17, 19, 23, 51, 57, 69, 323, 391, 437, 947, 969, 1173, 1311, 2841, 7429, 16099, 17993, 21781, 22287, 48297, 53979, 65343, 305881, 370277, 413839, 917643, 1110831, 1241517, 7035263, 21105789]

約数ペア:

[(1, 21105789), (3, 7035263), (17, 1241517), (19, 1110831), (23, 917643), (51, 413839), (57, 370277), (69, 305881), (323, 65343), (391, 53979), (437, 48297), (947, 22287), (969, 21781), (1173, 17993), (1311, 16099), (2841, 7429)]