686961980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{21589}}^1$

素因数の和:21678

約数の個数: 48

約数和(自身を含む): 1516136160

約数和(自身を除く): 829174180

約数列:

[1, 2, 4, 5, 10, 20, 37, 43, 74, 86, 148, 172, 185, 215, 370, 430, 740, 860, 1591, 3182, 6364, 7955, 15910, 21589, 31820, 43178, 86356, 107945, 215890, 431780, 798793, 928327, 1597586, 1856654, 3195172, 3713308, 3993965, 4641635, 7987930, 9283270, 15975860, 18566540, 34348099, 68696198, 137392396, 171740495, 343480990, 686961980]

約数ペア:

[(1, 686961980), (2, 343480990), (4, 171740495), (5, 137392396), (10, 68696198), (20, 34348099), (37, 18566540), (43, 15975860), (74, 9283270), (86, 7987930), (148, 4641635), (172, 3993965), (185, 3713308), (215, 3195172), (370, 1856654), (430, 1597586), (740, 928327), (860, 798793), (1591, 431780), (3182, 215890), (6364, 107945), (7955, 86356), (15910, 43178), (21589, 31820)]