21120015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2833}}^1$

素因数の和:2919

約数の個数: 32

約数和(自身を含む): 39177216

約数和(自身を除く): 18057201

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2833, 7455, 8499, 14165, 19831, 42495, 59493, 99155, 201143, 297465, 603429, 1005715, 1408001, 3017145, 4224003, 7040005, 21120015]

約数ペア:

[(1, 21120015), (3, 7040005), (5, 4224003), (7, 3017145), (15, 1408001), (21, 1005715), (35, 603429), (71, 297465), (105, 201143), (213, 99155), (355, 59493), (497, 42495), (1065, 19831), (1491, 14165), (2485, 8499), (2833, 7455)]