21989340

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{947}}^1$

素因数の和:1008

約数の個数: 96

約数和(自身を含む): 70076160

約数和(自身を除く): 48086820

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, 860, 947, 1161, 1290, 1548, 1894, 1935, 2322, 2580, 2841, 3788, 3870, 4644, 4735, 5682, 5805, 7740, 8523, 9470, 11364, 11610, 14205, 17046, 18940, 23220, 25569, 28410, 34092, 40721, 42615, 51138, 56820, 81442, 85230, 102276, 122163, 127845, 162884, 170460, 203605, 244326, 255690, 366489, 407210, 488652, 511380, 610815, 732978, 814420, 1099467, 1221630, 1465956, 1832445, 2198934, 2443260, 3664890, 4397868, 5497335, 7329780, 10994670, 21989340]

約数ペア:

[(1, 21989340), (2, 10994670), (3, 7329780), (4, 5497335), (5, 4397868), (6, 3664890), (9, 2443260), (10, 2198934), (12, 1832445), (15, 1465956), (18, 1221630), (20, 1099467), (27, 814420), (30, 732978), (36, 610815), (43, 511380), (45, 488652), (54, 407210), (60, 366489), (86, 255690), (90, 244326), (108, 203605), (129, 170460), (135, 162884), (172, 127845), (180, 122163), (215, 102276), (258, 85230), (270, 81442), (387, 56820), (430, 51138), (516, 42615), (540, 40721), (645, 34092), (774, 28410), (860, 25569), (947, 23220), (1161, 18940), (1290, 17046), (1548, 14205), (1894, 11610), (1935, 11364), (2322, 9470), (2580, 8523), (2841, 7740), (3788, 5805), (3870, 5682), (4644, 4735)]