21456650

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:279

約数の個数: 48

約数和(自身を含む): 41902080

約数和(自身を除く): 20445430

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 109, 127, 155, 218, 254, 310, 545, 635, 775, 1090, 1270, 1550, 2725, 3175, 3379, 3937, 5450, 6350, 6758, 7874, 13843, 16895, 19685, 27686, 33790, 39370, 69215, 84475, 98425, 138430, 168950, 196850, 346075, 429133, 692150, 858266, 2145665, 4291330, 10728325, 21456650]

約数ペア:

[(1, 21456650), (2, 10728325), (5, 4291330), (10, 2145665), (25, 858266), (31, 692150), (50, 429133), (62, 346075), (109, 196850), (127, 168950), (155, 138430), (218, 98425), (254, 84475), (310, 69215), (545, 39370), (635, 33790), (775, 27686), (1090, 19685), (1270, 16895), (1550, 13843), (2725, 7874), (3175, 6758), (3379, 6350), (3937, 5450)]