20491920

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{179}}^1$

素因数の和:254

約数の個数: 160

約数和(自身を含む): 72316800

約数和(自身を除く): 51824880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 53, 54, 60, 72, 80, 90, 106, 108, 120, 135, 144, 159, 179, 180, 212, 216, 240, 265, 270, 318, 358, 360, 424, 432, 477, 530, 537, 540, 636, 716, 720, 795, 848, 895, 954, 1060, 1074, 1080, 1272, 1431, 1432, 1590, 1611, 1790, 1908, 2120, 2148, 2160, 2385, 2544, 2685, 2862, 2864, 3180, 3222, 3580, 3816, 4240, 4296, 4770, 4833, 5370, 5724, 6360, 6444, 7155, 7160, 7632, 8055, 8592, 9487, 9540, 9666, 10740, 11448, 12720, 12888, 14310, 14320, 16110, 18974, 19080, 19332, 21480, 22896, 24165, 25776, 28461, 28620, 32220, 37948, 38160, 38664, 42960, 47435, 48330, 56922, 57240, 64440, 75896, 77328, 85383, 94870, 96660, 113844, 114480, 128880, 142305, 151792, 170766, 189740, 193320, 227688, 256149, 284610, 341532, 379480, 386640, 426915, 455376, 512298, 569220, 683064, 758960, 853830, 1024596, 1138440, 1280745, 1366128, 1707660, 2049192, 2276880, 2561490, 3415320, 4098384, 5122980, 6830640, 10245960, 20491920]

約数ペア:

[(1, 20491920), (2, 10245960), (3, 6830640), (4, 5122980), (5, 4098384), (6, 3415320), (8, 2561490), (9, 2276880), (10, 2049192), (12, 1707660), (15, 1366128), (16, 1280745), (18, 1138440), (20, 1024596), (24, 853830), (27, 758960), (30, 683064), (36, 569220), (40, 512298), (45, 455376), (48, 426915), (53, 386640), (54, 379480), (60, 341532), (72, 284610), (80, 256149), (90, 227688), (106, 193320), (108, 189740), (120, 170766), (135, 151792), (144, 142305), (159, 128880), (179, 114480), (180, 113844), (212, 96660), (216, 94870), (240, 85383), (265, 77328), (270, 75896), (318, 64440), (358, 57240), (360, 56922), (424, 48330), (432, 47435), (477, 42960), (530, 38664), (537, 38160), (540, 37948), (636, 32220), (716, 28620), (720, 28461), (795, 25776), (848, 24165), (895, 22896), (954, 21480), (1060, 19332), (1074, 19080), (1080, 18974), (1272, 16110), (1431, 14320), (1432, 14310), (1590, 12888), (1611, 12720), (1790, 11448), (1908, 10740), (2120, 9666), (2148, 9540), (2160, 9487), (2385, 8592), (2544, 8055), (2685, 7632), (2862, 7160), (2864, 7155), (3180, 6444), (3222, 6360), (3580, 5724), (3816, 5370), (4240, 4833), (4296, 4770)]