21456405

素因数分解:

$3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3037}}^1$

素因数の和:3205

約数の個数: 24

約数和(自身を含む): 37440312

約数和(自身を除く): 15983907

約数列:

[1, 3, 5, 9, 15, 45, 157, 471, 785, 1413, 2355, 3037, 7065, 9111, 15185, 27333, 45555, 136665, 476809, 1430427, 2384045, 4291281, 7152135, 21456405]

約数ペア:

[(1, 21456405), (3, 7152135), (5, 4291281), (9, 2384045), (15, 1430427), (45, 476809), (157, 136665), (471, 45555), (785, 27333), (1413, 15185), (2355, 9111), (3037, 7065)]