20784260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4789}}^1$

素因数の和:4836

約数の個数: 48

約数和(自身を含む): 51502080

約数和(自身を除く): 30717820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4789, 9578, 19156, 23945, 33523, 47890, 67046, 95780, 134092, 148459, 167615, 296918, 335230, 593836, 670460, 742295, 1039213, 1484590, 2078426, 2969180, 4156852, 5196065, 10392130, 20784260]

約数ペア:

[(1, 20784260), (2, 10392130), (4, 5196065), (5, 4156852), (7, 2969180), (10, 2078426), (14, 1484590), (20, 1039213), (28, 742295), (31, 670460), (35, 593836), (62, 335230), (70, 296918), (124, 167615), (140, 148459), (155, 134092), (217, 95780), (310, 67046), (434, 47890), (620, 33523), (868, 23945), (1085, 19156), (2170, 9578), (4340, 4789)]