20015640

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:494

約数の個数: 128

約数和(自身を含む): 68428800

約数和(自身を除く): 48413160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 43, 45, 54, 60, 72, 86, 90, 108, 120, 129, 135, 172, 180, 215, 216, 258, 270, 344, 360, 387, 430, 431, 516, 540, 645, 774, 860, 862, 1032, 1080, 1161, 1290, 1293, 1548, 1720, 1724, 1935, 2155, 2322, 2580, 2586, 3096, 3448, 3870, 3879, 4310, 4644, 5160, 5172, 5805, 6465, 7740, 7758, 8620, 9288, 10344, 11610, 11637, 12930, 15480, 15516, 17240, 18533, 19395, 23220, 23274, 25860, 31032, 37066, 38790, 46440, 46548, 51720, 55599, 58185, 74132, 77580, 92665, 93096, 111198, 116370, 148264, 155160, 166797, 185330, 222396, 232740, 277995, 333594, 370660, 444792, 465480, 500391, 555990, 667188, 741320, 833985, 1000782, 1111980, 1334376, 1667970, 2001564, 2223960, 2501955, 3335940, 4003128, 5003910, 6671880, 10007820, 20015640]

約数ペア:

[(1, 20015640), (2, 10007820), (3, 6671880), (4, 5003910), (5, 4003128), (6, 3335940), (8, 2501955), (9, 2223960), (10, 2001564), (12, 1667970), (15, 1334376), (18, 1111980), (20, 1000782), (24, 833985), (27, 741320), (30, 667188), (36, 555990), (40, 500391), (43, 465480), (45, 444792), (54, 370660), (60, 333594), (72, 277995), (86, 232740), (90, 222396), (108, 185330), (120, 166797), (129, 155160), (135, 148264), (172, 116370), (180, 111198), (215, 93096), (216, 92665), (258, 77580), (270, 74132), (344, 58185), (360, 55599), (387, 51720), (430, 46548), (431, 46440), (516, 38790), (540, 37066), (645, 31032), (774, 25860), (860, 23274), (862, 23220), (1032, 19395), (1080, 18533), (1161, 17240), (1290, 15516), (1293, 15480), (1548, 12930), (1720, 11637), (1724, 11610), (1935, 10344), (2155, 9288), (2322, 8620), (2580, 7758), (2586, 7740), (3096, 6465), (3448, 5805), (3870, 5172), (3879, 5160), (4310, 4644)]