21904925

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 33926400

約数和(自身を除く): 12021475

約数列:

[1, 5, 7, 17, 25, 35, 37, 85, 119, 175, 185, 199, 259, 425, 595, 629, 925, 995, 1295, 1393, 2975, 3145, 3383, 4403, 4975, 6475, 6965, 7363, 15725, 16915, 22015, 23681, 34825, 36815, 51541, 84575, 110075, 118405, 125171, 184075, 257705, 592025, 625855, 876197, 1288525, 3129275, 4380985, 21904925]

約数ペア:

[(1, 21904925), (5, 4380985), (7, 3129275), (17, 1288525), (25, 876197), (35, 625855), (37, 592025), (85, 257705), (119, 184075), (175, 125171), (185, 118405), (199, 110075), (259, 84575), (425, 51541), (595, 36815), (629, 34825), (925, 23681), (995, 22015), (1295, 16915), (1393, 15725), (2975, 7363), (3145, 6965), (3383, 6475), (4403, 4975)]