21052305

素因数分解:

$3^5\times 5^1\times {\mathrm{17327}}^1$

素因数の和:17347

約数の個数: 24

約数和(自身を含む): 37844352

約数和(自身を除く): 16792047

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17327, 51981, 86635, 155943, 259905, 467829, 779715, 1403487, 2339145, 4210461, 7017435, 21052305]

約数ペア:

[(1, 21052305), (3, 7017435), (5, 4210461), (9, 2339145), (15, 1403487), (27, 779715), (45, 467829), (81, 259905), (135, 155943), (243, 86635), (405, 51981), (1215, 17327)]