20000825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:162

約数の個数: 48

約数和(自身を含む): 29164800

約数和(自身を除く): 9163975

約数列:

[1, 5, 13, 19, 25, 41, 65, 79, 95, 205, 247, 325, 395, 475, 533, 779, 1025, 1027, 1235, 1501, 1975, 2665, 3239, 3895, 5135, 6175, 7505, 10127, 13325, 16195, 19475, 19513, 25675, 37525, 42107, 50635, 61541, 80975, 97565, 210535, 253175, 307705, 487825, 800033, 1052675, 1538525, 4000165, 20000825]

約数ペア:

[(1, 20000825), (5, 4000165), (13, 1538525), (19, 1052675), (25, 800033), (41, 487825), (65, 307705), (79, 253175), (95, 210535), (205, 97565), (247, 80975), (325, 61541), (395, 50635), (475, 42107), (533, 37525), (779, 25675), (1025, 19513), (1027, 19475), (1235, 16195), (1501, 13325), (1975, 10127), (2665, 7505), (3239, 6175), (3895, 5135)]