21538566

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{859}}^1$

素因数の和:1073

約数の個数: 48

約数和(自身を含む): 53664000

約数和(自身を除く): 32125434

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 199, 398, 597, 859, 1194, 1393, 1718, 1791, 2577, 2786, 3582, 4179, 5154, 6013, 7731, 8358, 12026, 12537, 15462, 18039, 25074, 36078, 54117, 108234, 170941, 341882, 512823, 1025646, 1196587, 1538469, 2393174, 3076938, 3589761, 7179522, 10769283, 21538566]

約数ペア:

[(1, 21538566), (2, 10769283), (3, 7179522), (6, 3589761), (7, 3076938), (9, 2393174), (14, 1538469), (18, 1196587), (21, 1025646), (42, 512823), (63, 341882), (126, 170941), (199, 108234), (398, 54117), (597, 36078), (859, 25074), (1194, 18039), (1393, 15462), (1718, 12537), (1791, 12026), (2577, 8358), (2786, 7731), (3582, 6013), (4179, 5154)]