20213984

素因数分解:

$2^5\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:160

約数の個数: 96

約数和(自身を含む): 48771072

約数和(自身を除く): 28557088

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 31, 32, 41, 56, 62, 71, 82, 112, 124, 142, 164, 217, 224, 248, 284, 287, 328, 434, 496, 497, 568, 574, 656, 868, 992, 994, 1136, 1148, 1271, 1312, 1736, 1988, 2201, 2272, 2296, 2542, 2911, 3472, 3976, 4402, 4592, 5084, 5822, 6944, 7952, 8804, 8897, 9184, 10168, 11644, 15407, 15904, 17608, 17794, 20336, 20377, 23288, 30814, 35216, 35588, 40672, 40754, 46576, 61628, 70432, 71176, 81508, 90241, 93152, 123256, 142352, 163016, 180482, 246512, 284704, 326032, 360964, 493024, 631687, 652064, 721928, 1263374, 1443856, 2526748, 2887712, 5053496, 10106992, 20213984]

約数ペア:

[(1, 20213984), (2, 10106992), (4, 5053496), (7, 2887712), (8, 2526748), (14, 1443856), (16, 1263374), (28, 721928), (31, 652064), (32, 631687), (41, 493024), (56, 360964), (62, 326032), (71, 284704), (82, 246512), (112, 180482), (124, 163016), (142, 142352), (164, 123256), (217, 93152), (224, 90241), (248, 81508), (284, 71176), (287, 70432), (328, 61628), (434, 46576), (496, 40754), (497, 40672), (568, 35588), (574, 35216), (656, 30814), (868, 23288), (992, 20377), (994, 20336), (1136, 17794), (1148, 17608), (1271, 15904), (1312, 15407), (1736, 11644), (1988, 10168), (2201, 9184), (2272, 8897), (2296, 8804), (2542, 7952), (2911, 6944), (3472, 5822), (3976, 5084), (4402, 4592)]