28001421

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 49296000

約数和(自身を除く): 21294579

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 149, 157, 171, 399, 447, 471, 1043, 1099, 1197, 1341, 1413, 2831, 2983, 3129, 3297, 8493, 8949, 9387, 9891, 19817, 20881, 23393, 25479, 26847, 59451, 62643, 70179, 163751, 178353, 187929, 210537, 444467, 491253, 1333401, 1473759, 3111269, 4000203, 9333807, 28001421]

約数ペア:

[(1, 28001421), (3, 9333807), (7, 4000203), (9, 3111269), (19, 1473759), (21, 1333401), (57, 491253), (63, 444467), (133, 210537), (149, 187929), (157, 178353), (171, 163751), (399, 70179), (447, 62643), (471, 59451), (1043, 26847), (1099, 25479), (1197, 23393), (1341, 20881), (1413, 19817), (2831, 9891), (2983, 9387), (3129, 8949), (3297, 8493)]