20490480

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{191}}^1$

素因数の和:359

約数の個数: 120

約数和(自身を含む): 69638400

約数和(自身を除く): 49147920

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 149, 180, 191, 240, 298, 360, 382, 447, 573, 596, 720, 745, 764, 894, 955, 1146, 1192, 1341, 1490, 1528, 1719, 1788, 1910, 2235, 2292, 2384, 2682, 2865, 2980, 3056, 3438, 3576, 3820, 4470, 4584, 5364, 5730, 5960, 6705, 6876, 7152, 7640, 8595, 8940, 9168, 10728, 11460, 11920, 13410, 13752, 15280, 17190, 17880, 21456, 22920, 26820, 27504, 28459, 34380, 35760, 45840, 53640, 56918, 68760, 85377, 107280, 113836, 137520, 142295, 170754, 227672, 256131, 284590, 341508, 426885, 455344, 512262, 569180, 683016, 853770, 1024524, 1138360, 1280655, 1366032, 1707540, 2049048, 2276720, 2561310, 3415080, 4098096, 5122620, 6830160, 10245240, 20490480]

約数ペア:

[(1, 20490480), (2, 10245240), (3, 6830160), (4, 5122620), (5, 4098096), (6, 3415080), (8, 2561310), (9, 2276720), (10, 2049048), (12, 1707540), (15, 1366032), (16, 1280655), (18, 1138360), (20, 1024524), (24, 853770), (30, 683016), (36, 569180), (40, 512262), (45, 455344), (48, 426885), (60, 341508), (72, 284590), (80, 256131), (90, 227672), (120, 170754), (144, 142295), (149, 137520), (180, 113836), (191, 107280), (240, 85377), (298, 68760), (360, 56918), (382, 53640), (447, 45840), (573, 35760), (596, 34380), (720, 28459), (745, 27504), (764, 26820), (894, 22920), (955, 21456), (1146, 17880), (1192, 17190), (1341, 15280), (1490, 13752), (1528, 13410), (1719, 11920), (1788, 11460), (1910, 10728), (2235, 9168), (2292, 8940), (2384, 8595), (2682, 7640), (2865, 7152), (2980, 6876), (3056, 6705), (3438, 5960), (3576, 5730), (3820, 5364), (4470, 4584)]