21807990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{293}}^1\times {\mathrm{827}}^1$

素因数の和:1133

約数の個数: 48

約数和(自身を含む): 56963088

約数和(自身を除く): 35155098

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 293, 586, 827, 879, 1465, 1654, 1758, 2481, 2637, 2930, 4135, 4395, 4962, 5274, 7443, 8270, 8790, 12405, 13185, 14886, 24810, 26370, 37215, 74430, 242311, 484622, 726933, 1211555, 1453866, 2180799, 2423110, 3634665, 4361598, 7269330, 10903995, 21807990]

約数ペア:

[(1, 21807990), (2, 10903995), (3, 7269330), (5, 4361598), (6, 3634665), (9, 2423110), (10, 2180799), (15, 1453866), (18, 1211555), (30, 726933), (45, 484622), (90, 242311), (293, 74430), (586, 37215), (827, 26370), (879, 24810), (1465, 14886), (1654, 13185), (1758, 12405), (2481, 8790), (2637, 8270), (2930, 7443), (4135, 5274), (4395, 4962)]