21007003689

素因数分解:

$3^2\times 7^2\times {\mathrm{1669}}^1\times {\mathrm{28541}}^1$

素因数の和:30230

約数の個数: 36

約数和(自身を含む): 35319868740

約数和(自身を除く): 14312865051

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 1669, 5007, 11683, 15021, 28541, 35049, 81781, 85623, 105147, 199787, 245343, 256869, 599361, 736029, 1398509, 1798083, 4195527, 12586581, 47634929, 142904787, 333444503, 428714361, 1000333509, 2334111521, 3001000527, 7002334563, 21007003689]

約数ペア:

[(1, 21007003689), (3, 7002334563), (7, 3001000527), (9, 2334111521), (21, 1000333509), (49, 428714361), (63, 333444503), (147, 142904787), (441, 47634929), (1669, 12586581), (5007, 4195527), (11683, 1798083), (15021, 1398509), (28541, 736029), (35049, 599361), (81781, 256869), (85623, 245343), (105147, 199787)]