19995840

素因数分解:

$2^6\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:207

約数の個数: 168

約数和(自身を含む): 70609968

約数和(自身を除く): 50614128

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, 131, 144, 159, 160, 180, 192, 212, 240, 262, 265, 288, 318, 320, 360, 393, 424, 477, 480, 524, 530, 576, 636, 655, 720, 786, 795, 848, 954, 960, 1048, 1060, 1179, 1272, 1310, 1440, 1572, 1590, 1696, 1908, 1965, 2096, 2120, 2358, 2385, 2544, 2620, 2880, 3144, 3180, 3392, 3816, 3930, 4192, 4240, 4716, 4770, 5088, 5240, 5895, 6288, 6360, 6943, 7632, 7860, 8384, 8480, 9432, 9540, 10176, 10480, 11790, 12576, 12720, 13886, 15264, 15720, 16960, 18864, 19080, 20829, 20960, 23580, 25152, 25440, 27772, 30528, 31440, 34715, 37728, 38160, 41658, 41920, 47160, 50880, 55544, 62487, 62880, 69430, 75456, 76320, 83316, 94320, 104145, 111088, 124974, 125760, 138860, 152640, 166632, 188640, 208290, 222176, 249948, 277720, 312435, 333264, 377280, 416580, 444352, 499896, 555440, 624870, 666528, 833160, 999792, 1110880, 1249740, 1333056, 1666320, 1999584, 2221760, 2499480, 3332640, 3999168, 4998960, 6665280, 9997920, 19995840]

約数ペア:

[(1, 19995840), (2, 9997920), (3, 6665280), (4, 4998960), (5, 3999168), (6, 3332640), (8, 2499480), (9, 2221760), (10, 1999584), (12, 1666320), (15, 1333056), (16, 1249740), (18, 1110880), (20, 999792), (24, 833160), (30, 666528), (32, 624870), (36, 555440), (40, 499896), (45, 444352), (48, 416580), (53, 377280), (60, 333264), (64, 312435), (72, 277720), (80, 249948), (90, 222176), (96, 208290), (106, 188640), (120, 166632), (131, 152640), (144, 138860), (159, 125760), (160, 124974), (180, 111088), (192, 104145), (212, 94320), (240, 83316), (262, 76320), (265, 75456), (288, 69430), (318, 62880), (320, 62487), (360, 55544), (393, 50880), (424, 47160), (477, 41920), (480, 41658), (524, 38160), (530, 37728), (576, 34715), (636, 31440), (655, 30528), (720, 27772), (786, 25440), (795, 25152), (848, 23580), (954, 20960), (960, 20829), (1048, 19080), (1060, 18864), (1179, 16960), (1272, 15720), (1310, 15264), (1440, 13886), (1572, 12720), (1590, 12576), (1696, 11790), (1908, 10480), (1965, 10176), (2096, 9540), (2120, 9432), (2358, 8480), (2385, 8384), (2544, 7860), (2620, 7632), (2880, 6943), (3144, 6360), (3180, 6288), (3392, 5895), (3816, 5240), (3930, 5088), (4192, 4770), (4240, 4716)]