21415785

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{821}}^1$

素因数の和:913

約数の個数: 32

約数和(自身を含む): 35983872

約数和(自身を除く): 14568087

約数列:

[1, 3, 5, 15, 37, 47, 111, 141, 185, 235, 555, 705, 821, 1739, 2463, 4105, 5217, 8695, 12315, 26085, 30377, 38587, 91131, 115761, 151885, 192935, 455655, 578805, 1427719, 4283157, 7138595, 21415785]

約数ペア:

[(1, 21415785), (3, 7138595), (5, 4283157), (15, 1427719), (37, 578805), (47, 455655), (111, 192935), (141, 151885), (185, 115761), (235, 91131), (555, 38587), (705, 30377), (821, 26085), (1739, 12315), (2463, 8695), (4105, 5217)]