19201325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 28873152

約数和(自身を除く): 9671827

約数列:

[1, 5, 11, 13, 25, 41, 55, 65, 131, 143, 205, 275, 325, 451, 533, 655, 715, 1025, 1441, 1703, 2255, 2665, 3275, 3575, 5371, 5863, 7205, 8515, 11275, 13325, 18733, 26855, 29315, 36025, 42575, 59081, 69823, 93665, 134275, 146575, 295405, 349115, 468325, 768053, 1477025, 1745575, 3840265, 19201325]

約数ペア:

[(1, 19201325), (5, 3840265), (11, 1745575), (13, 1477025), (25, 768053), (41, 468325), (55, 349115), (65, 295405), (131, 146575), (143, 134275), (205, 93665), (275, 69823), (325, 59081), (451, 42575), (533, 36025), (655, 29315), (715, 26855), (1025, 18733), (1441, 13325), (1703, 11275), (2255, 8515), (2665, 7205), (3275, 5863), (3575, 5371)]