21091500

素因数分解:

$2^2\times 3^2\times 5^3\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:177

約数の個数: 144

約数和(自身を含む): 68708640

約数和(自身を除く): 47617140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 43, 45, 50, 60, 75, 86, 90, 100, 109, 125, 129, 150, 172, 180, 215, 218, 225, 250, 258, 300, 327, 375, 387, 430, 436, 450, 500, 516, 545, 645, 654, 750, 774, 860, 900, 981, 1075, 1090, 1125, 1290, 1308, 1500, 1548, 1635, 1935, 1962, 2150, 2180, 2250, 2580, 2725, 3225, 3270, 3870, 3924, 4300, 4500, 4687, 4905, 5375, 5450, 6450, 6540, 7740, 8175, 9374, 9675, 9810, 10750, 10900, 12900, 13625, 14061, 16125, 16350, 18748, 19350, 19620, 21500, 23435, 24525, 27250, 28122, 32250, 32700, 38700, 40875, 42183, 46870, 48375, 49050, 54500, 56244, 64500, 70305, 81750, 84366, 93740, 96750, 98100, 117175, 122625, 140610, 163500, 168732, 193500, 210915, 234350, 245250, 281220, 351525, 421830, 468700, 490500, 585875, 703050, 843660, 1054575, 1171750, 1406100, 1757625, 2109150, 2343500, 3515250, 4218300, 5272875, 7030500, 10545750, 21091500]

約数ペア:

[(1, 21091500), (2, 10545750), (3, 7030500), (4, 5272875), (5, 4218300), (6, 3515250), (9, 2343500), (10, 2109150), (12, 1757625), (15, 1406100), (18, 1171750), (20, 1054575), (25, 843660), (30, 703050), (36, 585875), (43, 490500), (45, 468700), (50, 421830), (60, 351525), (75, 281220), (86, 245250), (90, 234350), (100, 210915), (109, 193500), (125, 168732), (129, 163500), (150, 140610), (172, 122625), (180, 117175), (215, 98100), (218, 96750), (225, 93740), (250, 84366), (258, 81750), (300, 70305), (327, 64500), (375, 56244), (387, 54500), (430, 49050), (436, 48375), (450, 46870), (500, 42183), (516, 40875), (545, 38700), (645, 32700), (654, 32250), (750, 28122), (774, 27250), (860, 24525), (900, 23435), (981, 21500), (1075, 19620), (1090, 19350), (1125, 18748), (1290, 16350), (1308, 16125), (1500, 14061), (1548, 13625), (1635, 12900), (1935, 10900), (1962, 10750), (2150, 9810), (2180, 9675), (2250, 9374), (2580, 8175), (2725, 7740), (3225, 6540), (3270, 6450), (3870, 5450), (3924, 5375), (4300, 4905), (4500, 4687)]