21294340

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{20089}}^1$

素因数の和:20151

約数の個数: 24

約数和(自身を含む): 45564120

約数和(自身を除く): 24269780

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 20089, 40178, 80356, 100445, 200890, 401780, 1064717, 2129434, 4258868, 5323585, 10647170, 21294340]

約数ペア:

[(1, 21294340), (2, 10647170), (4, 5323585), (5, 4258868), (10, 2129434), (20, 1064717), (53, 401780), (106, 200890), (212, 100445), (265, 80356), (530, 40178), (1060, 20089)]