21257040

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12653}}^1$

素因数の和:12676

約数の個数: 80

約数和(自身を含む): 75316608

約数和(自身を除く): 54059568

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12653, 25306, 37959, 50612, 63265, 75918, 88571, 101224, 126530, 151836, 177142, 189795, 202448, 253060, 265713, 303672, 354284, 379590, 442855, 506120, 531426, 607344, 708568, 759180, 885710, 1012240, 1062852, 1328565, 1417136, 1518360, 1771420, 2125704, 2657130, 3036720, 3542840, 4251408, 5314260, 7085680, 10628520, 21257040]

約数ペア:

[(1, 21257040), (2, 10628520), (3, 7085680), (4, 5314260), (5, 4251408), (6, 3542840), (7, 3036720), (8, 2657130), (10, 2125704), (12, 1771420), (14, 1518360), (15, 1417136), (16, 1328565), (20, 1062852), (21, 1012240), (24, 885710), (28, 759180), (30, 708568), (35, 607344), (40, 531426), (42, 506120), (48, 442855), (56, 379590), (60, 354284), (70, 303672), (80, 265713), (84, 253060), (105, 202448), (112, 189795), (120, 177142), (140, 151836), (168, 126530), (210, 101224), (240, 88571), (280, 75918), (336, 63265), (420, 50612), (560, 37959), (840, 25306), (1680, 12653)]