20511120

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{421}}^1$

素因数の和:473

約数の個数: 160

約数和(自身を含む): 75352320

約数和(自身を除く): 54841200

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 29, 30, 35, 40, 42, 48, 56, 58, 60, 70, 80, 84, 87, 105, 112, 116, 120, 140, 145, 168, 174, 203, 210, 232, 240, 280, 290, 336, 348, 406, 420, 421, 435, 464, 560, 580, 609, 696, 812, 840, 842, 870, 1015, 1160, 1218, 1263, 1392, 1624, 1680, 1684, 1740, 2030, 2105, 2320, 2436, 2526, 2947, 3045, 3248, 3368, 3480, 4060, 4210, 4872, 5052, 5894, 6090, 6315, 6736, 6960, 8120, 8420, 8841, 9744, 10104, 11788, 12180, 12209, 12630, 14735, 16240, 16840, 17682, 20208, 23576, 24360, 24418, 25260, 29470, 33680, 35364, 36627, 44205, 47152, 48720, 48836, 50520, 58940, 61045, 70728, 73254, 85463, 88410, 97672, 101040, 117880, 122090, 141456, 146508, 170926, 176820, 183135, 195344, 235760, 244180, 256389, 293016, 341852, 353640, 366270, 427315, 488360, 512778, 586032, 683704, 707280, 732540, 854630, 976720, 1025556, 1281945, 1367408, 1465080, 1709260, 2051112, 2563890, 2930160, 3418520, 4102224, 5127780, 6837040, 10255560, 20511120]

約数ペア:

[(1, 20511120), (2, 10255560), (3, 6837040), (4, 5127780), (5, 4102224), (6, 3418520), (7, 2930160), (8, 2563890), (10, 2051112), (12, 1709260), (14, 1465080), (15, 1367408), (16, 1281945), (20, 1025556), (21, 976720), (24, 854630), (28, 732540), (29, 707280), (30, 683704), (35, 586032), (40, 512778), (42, 488360), (48, 427315), (56, 366270), (58, 353640), (60, 341852), (70, 293016), (80, 256389), (84, 244180), (87, 235760), (105, 195344), (112, 183135), (116, 176820), (120, 170926), (140, 146508), (145, 141456), (168, 122090), (174, 117880), (203, 101040), (210, 97672), (232, 88410), (240, 85463), (280, 73254), (290, 70728), (336, 61045), (348, 58940), (406, 50520), (420, 48836), (421, 48720), (435, 47152), (464, 44205), (560, 36627), (580, 35364), (609, 33680), (696, 29470), (812, 25260), (840, 24418), (842, 24360), (870, 23576), (1015, 20208), (1160, 17682), (1218, 16840), (1263, 16240), (1392, 14735), (1624, 12630), (1680, 12209), (1684, 12180), (1740, 11788), (2030, 10104), (2105, 9744), (2320, 8841), (2436, 8420), (2526, 8120), (2947, 6960), (3045, 6736), (3248, 6315), (3368, 6090), (3480, 5894), (4060, 5052), (4210, 4872)]