21161385

素因数分解:

$3^3\times 5^1\times 7^3\times {\mathrm{457}}^1$

素因数の和:492

約数の個数: 64

約数和(自身を含む): 43968000

約数和(自身を除く): 22806615

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 105, 135, 147, 189, 245, 315, 343, 441, 457, 735, 945, 1029, 1323, 1371, 1715, 2205, 2285, 3087, 3199, 4113, 5145, 6615, 6855, 9261, 9597, 12339, 15435, 15995, 20565, 22393, 28791, 46305, 47985, 61695, 67179, 86373, 111965, 143955, 156751, 201537, 335895, 431865, 470253, 604611, 783755, 1007685, 1410759, 2351265, 3023055, 4232277, 7053795, 21161385]

約数ペア:

[(1, 21161385), (3, 7053795), (5, 4232277), (7, 3023055), (9, 2351265), (15, 1410759), (21, 1007685), (27, 783755), (35, 604611), (45, 470253), (49, 431865), (63, 335895), (105, 201537), (135, 156751), (147, 143955), (189, 111965), (245, 86373), (315, 67179), (343, 61695), (441, 47985), (457, 46305), (735, 28791), (945, 22393), (1029, 20565), (1323, 15995), (1371, 15435), (1715, 12339), (2205, 9597), (2285, 9261), (3087, 6855), (3199, 6615), (4113, 5145)]