8421140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:697

約数の個数: 72

約数和(自身を含む): 22187592

約数和(自身を除く): 13766452

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 661, 910, 980, 1274, 1322, 1820, 2548, 2644, 3185, 3305, 4627, 6370, 6610, 8593, 9254, 12740, 13220, 17186, 18508, 23135, 32389, 34372, 42965, 46270, 60151, 64778, 85930, 92540, 120302, 129556, 161945, 171860, 240604, 300755, 323890, 421057, 601510, 647780, 842114, 1203020, 1684228, 2105285, 4210570, 8421140]

約数ペア:

[(1, 8421140), (2, 4210570), (4, 2105285), (5, 1684228), (7, 1203020), (10, 842114), (13, 647780), (14, 601510), (20, 421057), (26, 323890), (28, 300755), (35, 240604), (49, 171860), (52, 161945), (65, 129556), (70, 120302), (91, 92540), (98, 85930), (130, 64778), (140, 60151), (182, 46270), (196, 42965), (245, 34372), (260, 32389), (364, 23135), (455, 18508), (490, 17186), (637, 13220), (661, 12740), (910, 9254), (980, 8593), (1274, 6610), (1322, 6370), (1820, 4627), (2548, 3305), (2644, 3185)]