21216960

素因数分解:

$2^6\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:215

約数の個数: 168

約数和(自身を含む): 74889360

約数和(自身を除く): 53672400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 53, 60, 64, 72, 80, 90, 96, 106, 120, 139, 144, 159, 160, 180, 192, 212, 240, 265, 278, 288, 318, 320, 360, 417, 424, 477, 480, 530, 556, 576, 636, 695, 720, 795, 834, 848, 954, 960, 1060, 1112, 1251, 1272, 1390, 1440, 1590, 1668, 1696, 1908, 2085, 2120, 2224, 2385, 2502, 2544, 2780, 2880, 3180, 3336, 3392, 3816, 4170, 4240, 4448, 4770, 5004, 5088, 5560, 6255, 6360, 6672, 7367, 7632, 8340, 8480, 8896, 9540, 10008, 10176, 11120, 12510, 12720, 13344, 14734, 15264, 16680, 16960, 19080, 20016, 22101, 22240, 25020, 25440, 26688, 29468, 30528, 33360, 36835, 38160, 40032, 44202, 44480, 50040, 50880, 58936, 66303, 66720, 73670, 76320, 80064, 88404, 100080, 110505, 117872, 132606, 133440, 147340, 152640, 176808, 200160, 221010, 235744, 265212, 294680, 331515, 353616, 400320, 442020, 471488, 530424, 589360, 663030, 707232, 884040, 1060848, 1178720, 1326060, 1414464, 1768080, 2121696, 2357440, 2652120, 3536160, 4243392, 5304240, 7072320, 10608480, 21216960]

約数ペア:

[(1, 21216960), (2, 10608480), (3, 7072320), (4, 5304240), (5, 4243392), (6, 3536160), (8, 2652120), (9, 2357440), (10, 2121696), (12, 1768080), (15, 1414464), (16, 1326060), (18, 1178720), (20, 1060848), (24, 884040), (30, 707232), (32, 663030), (36, 589360), (40, 530424), (45, 471488), (48, 442020), (53, 400320), (60, 353616), (64, 331515), (72, 294680), (80, 265212), (90, 235744), (96, 221010), (106, 200160), (120, 176808), (139, 152640), (144, 147340), (159, 133440), (160, 132606), (180, 117872), (192, 110505), (212, 100080), (240, 88404), (265, 80064), (278, 76320), (288, 73670), (318, 66720), (320, 66303), (360, 58936), (417, 50880), (424, 50040), (477, 44480), (480, 44202), (530, 40032), (556, 38160), (576, 36835), (636, 33360), (695, 30528), (720, 29468), (795, 26688), (834, 25440), (848, 25020), (954, 22240), (960, 22101), (1060, 20016), (1112, 19080), (1251, 16960), (1272, 16680), (1390, 15264), (1440, 14734), (1590, 13344), (1668, 12720), (1696, 12510), (1908, 11120), (2085, 10176), (2120, 10008), (2224, 9540), (2385, 8896), (2502, 8480), (2544, 8340), (2780, 7632), (2880, 7367), (3180, 6672), (3336, 6360), (3392, 6255), (3816, 5560), (4170, 5088), (4240, 5004), (4448, 4770)]