20123123775

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{31}}^2\times {\mathrm{61}}^1\times {\mathrm{199}}^1$

素因数の和:358

約数の個数: 144

約数和(自身を含む): 36644083200

約数和(自身を除く): 16520959425

約数列:

[1, 3, 5, 15, 23, 25, 31, 61, 69, 75, 93, 115, 155, 183, 199, 305, 345, 465, 575, 597, 713, 775, 915, 961, 995, 1403, 1525, 1725, 1891, 2139, 2325, 2883, 2985, 3565, 4209, 4575, 4577, 4805, 4975, 5673, 6169, 7015, 9455, 10695, 12139, 13731, 14415, 14925, 17825, 18507, 21045, 22103, 22885, 24025, 28365, 30845, 35075, 36417, 43493, 47275, 53475, 58621, 60695, 66309, 68655, 72075, 92535, 105225, 110515, 114425, 130479, 141825, 141887, 154225, 175863, 182085, 191239, 217465, 279197, 293105, 303475, 331545, 343275, 376309, 425661, 462675, 552575, 573717, 652395, 709435, 837591, 879315, 910425, 956195, 1087325, 1128927, 1348283, 1395985, 1465525, 1657725, 1881545, 2128305, 2868585, 3261975, 3547175, 4044849, 4187955, 4396575, 4398497, 4780975, 5644635, 6741415, 6979925, 8655107, 9407725, 10641525, 11665579, 13195491, 14342925, 20224245, 20939775, 21992485, 25965321, 28223175, 33707075, 34996737, 43275535, 58327895, 65977455, 101121225, 109962425, 129826605, 174983685, 216377675, 268308317, 291639475, 329887275, 649133025, 804924951, 874918425, 1341541585, 4024624755, 6707707925, 20123123775]

約数ペア:

[(1, 20123123775), (3, 6707707925), (5, 4024624755), (15, 1341541585), (23, 874918425), (25, 804924951), (31, 649133025), (61, 329887275), (69, 291639475), (75, 268308317), (93, 216377675), (115, 174983685), (155, 129826605), (183, 109962425), (199, 101121225), (305, 65977455), (345, 58327895), (465, 43275535), (575, 34996737), (597, 33707075), (713, 28223175), (775, 25965321), (915, 21992485), (961, 20939775), (995, 20224245), (1403, 14342925), (1525, 13195491), (1725, 11665579), (1891, 10641525), (2139, 9407725), (2325, 8655107), (2883, 6979925), (2985, 6741415), (3565, 5644635), (4209, 4780975), (4575, 4398497), (4577, 4396575), (4805, 4187955), (4975, 4044849), (5673, 3547175), (6169, 3261975), (7015, 2868585), (9455, 2128305), (10695, 1881545), (12139, 1657725), (13731, 1465525), (14415, 1395985), (14925, 1348283), (17825, 1128927), (18507, 1087325), (21045, 956195), (22103, 910425), (22885, 879315), (24025, 837591), (28365, 709435), (30845, 652395), (35075, 573717), (36417, 552575), (43493, 462675), (47275, 425661), (53475, 376309), (58621, 343275), (60695, 331545), (66309, 303475), (68655, 293105), (72075, 279197), (92535, 217465), (105225, 191239), (110515, 182085), (114425, 175863), (130479, 154225), (141825, 141887)]