19820360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{997}}^1$

素因数の和:1086

約数の個数: 64

約数和(自身を含む): 51736320

約数和(自身を除く): 31915960

約数列:

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

約数ペア:

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