21609995

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{1553}}^1$

素因数の和:1603

約数の個数: 24

約数和(自身を含む): 29762208

約数和(自身を除く): 8152213

約数列:

[1, 5, 11, 23, 55, 115, 121, 253, 605, 1265, 1553, 2783, 7765, 13915, 17083, 35719, 85415, 178595, 187913, 392909, 939565, 1964545, 4321999, 21609995]

約数ペア:

[(1, 21609995), (5, 4321999), (11, 1964545), (23, 939565), (55, 392909), (115, 187913), (121, 178595), (253, 85415), (605, 35719), (1265, 17083), (1553, 13915), (2783, 7765)]