18420945

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:154

約数の個数: 64

約数和(自身を含む): 33592320

約数和(自身を除く): 15171375

約数列:

[1, 3, 5, 15, 17, 29, 47, 51, 53, 85, 87, 141, 145, 159, 235, 255, 265, 435, 493, 705, 795, 799, 901, 1363, 1479, 1537, 2397, 2465, 2491, 2703, 3995, 4089, 4505, 4611, 6815, 7395, 7473, 7685, 11985, 12455, 13515, 20445, 23055, 23171, 26129, 37365, 42347, 69513, 72239, 78387, 115855, 127041, 130645, 211735, 216717, 347565, 361195, 391935, 635205, 1083585, 1228063, 3684189, 6140315, 18420945]

約数ペア:

[(1, 18420945), (3, 6140315), (5, 3684189), (15, 1228063), (17, 1083585), (29, 635205), (47, 391935), (51, 361195), (53, 347565), (85, 216717), (87, 211735), (141, 130645), (145, 127041), (159, 115855), (235, 78387), (255, 72239), (265, 69513), (435, 42347), (493, 37365), (705, 26129), (795, 23171), (799, 23055), (901, 20445), (1363, 13515), (1479, 12455), (1537, 11985), (2397, 7685), (2465, 7473), (2491, 7395), (2703, 6815), (3995, 4611), (4089, 4505)]