20275550

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{127}}^1$

素因数の和:273

約数の個数: 48

約数和(自身を含む): 39616512

約数和(自身を除く): 19340962

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 103, 127, 155, 206, 254, 310, 515, 635, 775, 1030, 1270, 1550, 2575, 3175, 3193, 3937, 5150, 6350, 6386, 7874, 13081, 15965, 19685, 26162, 31930, 39370, 65405, 79825, 98425, 130810, 159650, 196850, 327025, 405511, 654050, 811022, 2027555, 4055110, 10137775, 20275550]

約数ペア:

[(1, 20275550), (2, 10137775), (5, 4055110), (10, 2027555), (25, 811022), (31, 654050), (50, 405511), (62, 327025), (103, 196850), (127, 159650), (155, 130810), (206, 98425), (254, 79825), (310, 65405), (515, 39370), (635, 31930), (775, 26162), (1030, 19685), (1270, 15965), (1550, 13081), (2575, 7874), (3175, 6386), (3193, 6350), (3937, 5150)]