21025095

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 42169344

約数和(自身を除く): 21144249

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 73, 91, 105, 195, 211, 219, 273, 365, 455, 511, 633, 949, 1055, 1095, 1365, 1477, 1533, 2555, 2743, 2847, 3165, 4431, 4745, 6643, 7385, 7665, 8229, 13715, 14235, 15403, 19201, 19929, 22155, 33215, 41145, 46209, 57603, 77015, 96005, 99645, 107821, 200239, 231045, 288015, 323463, 539105, 600717, 1001195, 1401673, 1617315, 3003585, 4205019, 7008365, 21025095]

約数ペア:

[(1, 21025095), (3, 7008365), (5, 4205019), (7, 3003585), (13, 1617315), (15, 1401673), (21, 1001195), (35, 600717), (39, 539105), (65, 323463), (73, 288015), (91, 231045), (105, 200239), (195, 107821), (211, 99645), (219, 96005), (273, 77015), (365, 57603), (455, 46209), (511, 41145), (633, 33215), (949, 22155), (1055, 19929), (1095, 19201), (1365, 15403), (1477, 14235), (1533, 13715), (2555, 8229), (2743, 7665), (2847, 7385), (3165, 6643), (4431, 4745)]