2180367020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{20809}}^1$

素因数の和:20875

約数の個数: 72

約数和(自身を含む): 5118261120

約数和(自身を除く): 2937894100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 260, 310, 338, 403, 620, 676, 806, 845, 1612, 1690, 2015, 3380, 4030, 5239, 8060, 10478, 20809, 20956, 26195, 41618, 52390, 83236, 104045, 104780, 208090, 270517, 416180, 541034, 645079, 1082068, 1290158, 1352585, 2580316, 2705170, 3225395, 3516721, 5410340, 6450790, 7033442, 8386027, 12901580, 14066884, 16772054, 17583605, 33544108, 35167210, 41930135, 70334420, 83860270, 109018351, 167720540, 218036702, 436073404, 545091755, 1090183510, 2180367020]

約数ペア:

[(1, 2180367020), (2, 1090183510), (4, 545091755), (5, 436073404), (10, 218036702), (13, 167720540), (20, 109018351), (26, 83860270), (31, 70334420), (52, 41930135), (62, 35167210), (65, 33544108), (124, 17583605), (130, 16772054), (155, 14066884), (169, 12901580), (260, 8386027), (310, 7033442), (338, 6450790), (403, 5410340), (620, 3516721), (676, 3225395), (806, 2705170), (845, 2580316), (1612, 1352585), (1690, 1290158), (2015, 1082068), (3380, 645079), (4030, 541034), (5239, 416180), (8060, 270517), (10478, 208090), (20809, 104780), (20956, 104045), (26195, 83236), (41618, 52390)]