21606915

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7703}}^1$

素因数の和:7739

約数の個数: 32

約数和(自身を含む): 39937536

約数和(自身を除く): 18330621

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7703, 23109, 38515, 84733, 115545, 130951, 254199, 392853, 423665, 654755, 1270995, 1440461, 1964265, 4321383, 7202305, 21606915]

約数ペア:

[(1, 21606915), (3, 7202305), (5, 4321383), (11, 1964265), (15, 1440461), (17, 1270995), (33, 654755), (51, 423665), (55, 392853), (85, 254199), (165, 130951), (187, 115545), (255, 84733), (561, 38515), (935, 23109), (2805, 7703)]