39640720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{997}}^1$

素因数の和:1088

約数の個数: 80

約数和(自身を含む): 106921728

約数和(自身を除く): 67281008

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 497, 560, 568, 710, 994, 997, 1136, 1420, 1988, 1994, 2485, 2840, 3976, 3988, 4970, 4985, 5680, 6979, 7952, 7976, 9940, 9970, 13958, 15952, 19880, 19940, 27916, 34895, 39760, 39880, 55832, 69790, 70787, 79760, 111664, 139580, 141574, 279160, 283148, 353935, 495509, 558320, 566296, 707870, 991018, 1132592, 1415740, 1982036, 2477545, 2831480, 3964072, 4955090, 5662960, 7928144, 9910180, 19820360, 39640720]

約数ペア:

[(1, 39640720), (2, 19820360), (4, 9910180), (5, 7928144), (7, 5662960), (8, 4955090), (10, 3964072), (14, 2831480), (16, 2477545), (20, 1982036), (28, 1415740), (35, 1132592), (40, 991018), (56, 707870), (70, 566296), (71, 558320), (80, 495509), (112, 353935), (140, 283148), (142, 279160), (280, 141574), (284, 139580), (355, 111664), (497, 79760), (560, 70787), (568, 69790), (710, 55832), (994, 39880), (997, 39760), (1136, 34895), (1420, 27916), (1988, 19940), (1994, 19880), (2485, 15952), (2840, 13958), (3976, 9970), (3988, 9940), (4970, 7976), (4985, 7952), (5680, 6979)]