21401317

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{149}}^1$

素因数の和:261

約数の個数: 24

約数和(自身を含む): 26524800

約数和(自身を除く): 5123483

約数列:

[1, 7, 17, 71, 119, 149, 289, 497, 1043, 1207, 2023, 2533, 8449, 10579, 17731, 20519, 43061, 74053, 143633, 179843, 301427, 1258901, 3057331, 21401317]

約数ペア:

[(1, 21401317), (7, 3057331), (17, 1258901), (71, 301427), (119, 179843), (149, 143633), (289, 74053), (497, 43061), (1043, 20519), (1207, 17731), (2023, 10579), (2533, 8449)]