21789901

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{3301}}^1$

素因数の和:3372

約数の個数: 16

約数和(自身を含む): 26627328

約数和(自身を除く): 4837427

約数列:

[1, 7, 23, 41, 161, 287, 943, 3301, 6601, 23107, 75923, 135341, 531461, 947387, 3112843, 21789901]

約数ペア:

[(1, 21789901), (7, 3112843), (23, 947387), (41, 531461), (161, 135341), (287, 75923), (943, 23107), (3301, 6601)]