19945980

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{859}}^1$

素因数の和:920

約数の個数: 96

約数和(自身を含む): 63571200

約数和(自身を除く): 43625220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 43, 45, 54, 60, 86, 90, 108, 129, 135, 172, 180, 215, 258, 270, 387, 430, 516, 540, 645, 774, 859, 860, 1161, 1290, 1548, 1718, 1935, 2322, 2577, 2580, 3436, 3870, 4295, 4644, 5154, 5805, 7731, 7740, 8590, 10308, 11610, 12885, 15462, 17180, 23193, 23220, 25770, 30924, 36937, 38655, 46386, 51540, 73874, 77310, 92772, 110811, 115965, 147748, 154620, 184685, 221622, 231930, 332433, 369370, 443244, 463860, 554055, 664866, 738740, 997299, 1108110, 1329732, 1662165, 1994598, 2216220, 3324330, 3989196, 4986495, 6648660, 9972990, 19945980]

約数ペア:

[(1, 19945980), (2, 9972990), (3, 6648660), (4, 4986495), (5, 3989196), (6, 3324330), (9, 2216220), (10, 1994598), (12, 1662165), (15, 1329732), (18, 1108110), (20, 997299), (27, 738740), (30, 664866), (36, 554055), (43, 463860), (45, 443244), (54, 369370), (60, 332433), (86, 231930), (90, 221622), (108, 184685), (129, 154620), (135, 147748), (172, 115965), (180, 110811), (215, 92772), (258, 77310), (270, 73874), (387, 51540), (430, 46386), (516, 38655), (540, 36937), (645, 30924), (774, 25770), (859, 23220), (860, 23193), (1161, 17180), (1290, 15462), (1548, 12885), (1718, 11610), (1935, 10308), (2322, 8590), (2577, 7740), (2580, 7731), (3436, 5805), (3870, 5154), (4295, 4644)]