19986512

素因数分解:

$2^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1$

素因数の和:125

約数の個数: 120

約数和(自身を含む): 50762376

約数和(自身を除く): 30775864

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 37, 49, 52, 53, 56, 74, 91, 98, 104, 106, 112, 148, 182, 196, 208, 212, 259, 296, 364, 371, 392, 424, 481, 518, 592, 637, 689, 728, 742, 784, 848, 962, 1036, 1274, 1378, 1456, 1484, 1813, 1924, 1961, 2072, 2548, 2597, 2756, 2968, 3367, 3626, 3848, 3922, 4144, 4823, 5096, 5194, 5512, 5936, 6734, 7252, 7696, 7844, 9646, 10192, 10388, 11024, 13468, 13727, 14504, 15688, 19292, 20776, 23569, 25493, 26936, 27454, 29008, 31376, 33761, 38584, 41552, 47138, 50986, 53872, 54908, 67522, 77168, 94276, 96089, 101972, 109816, 135044, 178451, 188552, 192178, 203944, 219632, 270088, 356902, 377104, 384356, 407888, 540176, 713804, 768712, 1249157, 1427608, 1537424, 2498314, 2855216, 4996628, 9993256, 19986512]

約数ペア:

[(1, 19986512), (2, 9993256), (4, 4996628), (7, 2855216), (8, 2498314), (13, 1537424), (14, 1427608), (16, 1249157), (26, 768712), (28, 713804), (37, 540176), (49, 407888), (52, 384356), (53, 377104), (56, 356902), (74, 270088), (91, 219632), (98, 203944), (104, 192178), (106, 188552), (112, 178451), (148, 135044), (182, 109816), (196, 101972), (208, 96089), (212, 94276), (259, 77168), (296, 67522), (364, 54908), (371, 53872), (392, 50986), (424, 47138), (481, 41552), (518, 38584), (592, 33761), (637, 31376), (689, 29008), (728, 27454), (742, 26936), (784, 25493), (848, 23569), (962, 20776), (1036, 19292), (1274, 15688), (1378, 14504), (1456, 13727), (1484, 13468), (1813, 11024), (1924, 10388), (1961, 10192), (2072, 9646), (2548, 7844), (2597, 7696), (2756, 7252), (2968, 6734), (3367, 5936), (3626, 5512), (3848, 5194), (3922, 5096), (4144, 4823)]