21305855

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{2417}}^1$

素因数の和:2506

約数の個数: 16

約数和(自身を含む): 26810784

約数和(自身を除く): 5504929

約数列:

[1, 5, 41, 43, 205, 215, 1763, 2417, 8815, 12085, 99097, 103931, 495485, 519655, 4261171, 21305855]

約数ペア:

[(1, 21305855), (5, 4261171), (41, 519655), (43, 495485), (205, 103931), (215, 99097), (1763, 12085), (2417, 8815)]