21015015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{263}}^1\times {\mathrm{761}}^1$

素因数の和:1039

約数の個数: 32

約数和(自身を含む): 38624256

約数和(自身を除く): 17609241

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 263, 761, 789, 1315, 1841, 2283, 3805, 3945, 5327, 5523, 9205, 11415, 15981, 26635, 27615, 79905, 200143, 600429, 1000715, 1401001, 3002145, 4203003, 7005005, 21015015]

約数ペア:

[(1, 21015015), (3, 7005005), (5, 4203003), (7, 3002145), (15, 1401001), (21, 1000715), (35, 600429), (105, 200143), (263, 79905), (761, 27615), (789, 26635), (1315, 15981), (1841, 11415), (2283, 9205), (3805, 5523), (3945, 5327)]