21255550

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{137}}^1$

素因数の和:285

約数の個数: 48

約数和(自身を含む): 41582160

約数和(自身を除く): 20326610

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 107, 137, 145, 214, 274, 290, 535, 685, 725, 1070, 1370, 1450, 2675, 3103, 3425, 3973, 5350, 6206, 6850, 7946, 14659, 15515, 19865, 29318, 31030, 39730, 73295, 77575, 99325, 146590, 155150, 198650, 366475, 425111, 732950, 850222, 2125555, 4251110, 10627775, 21255550]

約数ペア:

[(1, 21255550), (2, 10627775), (5, 4251110), (10, 2125555), (25, 850222), (29, 732950), (50, 425111), (58, 366475), (107, 198650), (137, 155150), (145, 146590), (214, 99325), (274, 77575), (290, 73295), (535, 39730), (685, 31030), (725, 29318), (1070, 19865), (1370, 15515), (1450, 14659), (2675, 7946), (3103, 6850), (3425, 6206), (3973, 5350)]