21003993

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{1283}}^1$

素因数の和:1413

約数の個数: 24

約数和(自身を含む): 32449248

約数和(自身を除く): 11445255

約数列:

[1, 3, 9, 17, 51, 107, 153, 321, 963, 1283, 1819, 3849, 5457, 11547, 16371, 21811, 65433, 137281, 196299, 411843, 1235529, 2333777, 7001331, 21003993]

約数ペア:

[(1, 21003993), (3, 7001331), (9, 2333777), (17, 1235529), (51, 411843), (107, 196299), (153, 137281), (321, 65433), (963, 21811), (1283, 16371), (1819, 11547), (3849, 5457)]