21189950

素因数分解:

$2^1\times 5^2\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 41140224

約数和(自身を除く): 19950274

約数列:

[1, 2, 5, 10, 25, 47, 50, 71, 94, 127, 142, 235, 254, 355, 470, 635, 710, 1175, 1270, 1775, 2350, 3175, 3337, 3550, 5969, 6350, 6674, 9017, 11938, 16685, 18034, 29845, 33370, 45085, 59690, 83425, 90170, 149225, 166850, 225425, 298450, 423799, 450850, 847598, 2118995, 4237990, 10594975, 21189950]

約数ペア:

[(1, 21189950), (2, 10594975), (5, 4237990), (10, 2118995), (25, 847598), (47, 450850), (50, 423799), (71, 298450), (94, 225425), (127, 166850), (142, 149225), (235, 90170), (254, 83425), (355, 59690), (470, 45085), (635, 33370), (710, 29845), (1175, 18034), (1270, 16685), (1775, 11938), (2350, 9017), (3175, 6674), (3337, 6350), (3550, 5969)]