21403025

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 32914560

約数和(自身を除く): 11511535

約数列:

[1, 5, 7, 19, 25, 35, 41, 95, 133, 157, 175, 205, 287, 475, 665, 779, 785, 1025, 1099, 1435, 2983, 3325, 3895, 3925, 5453, 5495, 6437, 7175, 14915, 19475, 20881, 27265, 27475, 32185, 45059, 74575, 104405, 122303, 136325, 160925, 225295, 522025, 611515, 856121, 1126475, 3057575, 4280605, 21403025]

約数ペア:

[(1, 21403025), (5, 4280605), (7, 3057575), (19, 1126475), (25, 856121), (35, 611515), (41, 522025), (95, 225295), (133, 160925), (157, 136325), (175, 122303), (205, 104405), (287, 74575), (475, 45059), (665, 32185), (779, 27475), (785, 27265), (1025, 20881), (1099, 19475), (1435, 14915), (2983, 7175), (3325, 6437), (3895, 5495), (3925, 5453)]