19995984

素因数分解:

$2^4\times 3^5\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:199

約数の個数: 120

約数和(自身を含む): 60030880

約数和(自身を除く): 40034896

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 37, 48, 54, 72, 74, 81, 108, 111, 139, 144, 148, 162, 216, 222, 243, 278, 296, 324, 333, 417, 432, 444, 486, 556, 592, 648, 666, 834, 888, 972, 999, 1112, 1251, 1296, 1332, 1668, 1776, 1944, 1998, 2224, 2502, 2664, 2997, 3336, 3753, 3888, 3996, 5004, 5143, 5328, 5994, 6672, 7506, 7992, 8991, 10008, 10286, 11259, 11988, 15012, 15429, 15984, 17982, 20016, 20572, 22518, 23976, 30024, 30858, 33777, 35964, 41144, 45036, 46287, 47952, 60048, 61716, 67554, 71928, 82288, 90072, 92574, 123432, 135108, 138861, 143856, 180144, 185148, 246864, 270216, 277722, 370296, 416583, 540432, 555444, 740592, 833166, 1110888, 1249749, 1666332, 2221776, 2499498, 3332664, 4998996, 6665328, 9997992, 19995984]

約数ペア:

[(1, 19995984), (2, 9997992), (3, 6665328), (4, 4998996), (6, 3332664), (8, 2499498), (9, 2221776), (12, 1666332), (16, 1249749), (18, 1110888), (24, 833166), (27, 740592), (36, 555444), (37, 540432), (48, 416583), (54, 370296), (72, 277722), (74, 270216), (81, 246864), (108, 185148), (111, 180144), (139, 143856), (144, 138861), (148, 135108), (162, 123432), (216, 92574), (222, 90072), (243, 82288), (278, 71928), (296, 67554), (324, 61716), (333, 60048), (417, 47952), (432, 46287), (444, 45036), (486, 41144), (556, 35964), (592, 33777), (648, 30858), (666, 30024), (834, 23976), (888, 22518), (972, 20572), (999, 20016), (1112, 17982), (1251, 15984), (1296, 15429), (1332, 15012), (1668, 11988), (1776, 11259), (1944, 10286), (1998, 10008), (2224, 8991), (2502, 7992), (2664, 7506), (2997, 6672), (3336, 5994), (3753, 5328), (3888, 5143), (3996, 5004)]